./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt --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 2d5a995d825785bc5dc95f3825623b1e4ecd07fe ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:41:46,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:41:46,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:41:46,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:41:46,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:41:46,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:41:46,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:41:46,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:41:46,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:41:46,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:41:46,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:41:46,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:41:46,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:41:46,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:41:46,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:41:46,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:41:46,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:41:46,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:41:46,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:41:46,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:41:46,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:41:46,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:41:46,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:41:46,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:41:46,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:41:46,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:41:46,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:41:46,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:41:46,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:41:46,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:41:46,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:41:46,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:41:46,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:41:46,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:41:46,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:41:46,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:41:46,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:41:46,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:41:46,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:41:46,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:41:46,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:41:46,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:41:46,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:41:46,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:41:46,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:41:46,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:41:46,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:41:46,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:41:46,984 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:41:46,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:41:46,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:41:46,985 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:41:46,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:41:46,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:41:46,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:41:46,986 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:41:46,986 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:41:46,986 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:41:46,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:41:46,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:41:46,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:41:46,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:41:46,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:41:46,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:41:46,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:41:46,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:41:46,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:41:46,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:41:46,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:41:46,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:41:46,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:41:46,989 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_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d5a995d825785bc5dc95f3825623b1e4ecd07fe [2021-10-13 00:41:47,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:41:47,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:41:47,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:41:47,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:41:47,242 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:41:47,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-10-13 00:41:47,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/data/0edda3457/f241ef137e314fa9bdf51cc3a5a9988f/FLAG08a7818bd [2021-10-13 00:41:47,787 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:41:47,787 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-10-13 00:41:47,806 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/data/0edda3457/f241ef137e314fa9bdf51cc3a5a9988f/FLAG08a7818bd [2021-10-13 00:41:48,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/data/0edda3457/f241ef137e314fa9bdf51cc3a5a9988f [2021-10-13 00:41:48,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:41:48,137 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:41:48,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:41:48,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:41:48,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:41:48,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4240aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48, skipping insertion in model container [2021-10-13 00:41:48,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:41:48,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:41:48,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:41:48,583 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:41:48,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:41:48,660 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:41:48,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48 WrapperNode [2021-10-13 00:41:48,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:41:48,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:41:48,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:41:48,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:41:48,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:41:48,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:41:48,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:41:48,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:41:48,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (1/1) ... [2021-10-13 00:41:48,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:41:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:48,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:41:48,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:41:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:41:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:41:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:41:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:41:48,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 00:41:48,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 00:41:48,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 00:41:48,824 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2021-10-13 00:41:48,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:41:48,824 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:41:48,824 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:41:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:41:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:41:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:41:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:41:48,829 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:41:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:41:48,831 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:41:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:41:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:41:48,834 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:41:48,835 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:41:48,836 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:41:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:41:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-13 00:41:48,839 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:41:48,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:41:49,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:41:49,369 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-13 00:41:49,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:41:49 BoogieIcfgContainer [2021-10-13 00:41:49,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:41:49,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:41:49,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:41:49,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:41:49,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:41:48" (1/3) ... [2021-10-13 00:41:49,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626949cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:41:49, skipping insertion in model container [2021-10-13 00:41:49,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:41:48" (2/3) ... [2021-10-13 00:41:49,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626949cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:41:49, skipping insertion in model container [2021-10-13 00:41:49,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:41:49" (3/3) ... [2021-10-13 00:41:49,399 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2021-10-13 00:41:49,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:41:49,406 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-13 00:41:49,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:41:49,483 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, mConcurrency=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 [2021-10-13 00:41:49,484 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-13 00:41:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 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) [2021-10-13 00:41:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:41:49,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:49,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:49,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1980189205, now seen corresponding path program 1 times [2021-10-13 00:41:49,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:49,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952724839] [2021-10-13 00:41:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:49,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:49,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:49,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:49,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952724839] [2021-10-13 00:41:49,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952724839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:49,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:49,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:41:49,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445359063] [2021-10-13 00:41:49,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:41:49,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:41:49,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:49,837 INFO L87 Difference]: Start difference. First operand has 66 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 00:41:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:50,040 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-10-13 00:41:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:50,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-10-13 00:41:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:50,050 INFO L225 Difference]: With dead ends: 88 [2021-10-13 00:41:50,051 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 00:41:50,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:41:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 00:41:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-10-13 00:41:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 60 states have internal predecessors, (71), 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) [2021-10-13 00:41:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-13 00:41:50,091 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 11 [2021-10-13 00:41:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:50,092 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-13 00:41:50,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 00:41:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-13 00:41:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:41:50,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:50,093 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:50,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:41:50,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1982036247, now seen corresponding path program 1 times [2021-10-13 00:41:50,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:50,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179140271] [2021-10-13 00:41:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:50,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:50,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:50,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179140271] [2021-10-13 00:41:50,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179140271] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:50,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:50,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:50,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549539677] [2021-10-13 00:41:50,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:41:50,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:41:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:50,203 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 00:41:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:50,383 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-10-13 00:41:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:41:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-10-13 00:41:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:50,385 INFO L225 Difference]: With dead ends: 89 [2021-10-13 00:41:50,385 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 00:41:50,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 00:41:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2021-10-13 00:41:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 62 states have internal predecessors, (75), 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) [2021-10-13 00:41:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-10-13 00:41:50,395 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 11 [2021-10-13 00:41:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:50,395 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-10-13 00:41:50,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 00:41:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-10-13 00:41:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:41:50,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:50,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:50,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:41:50,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1982036246, now seen corresponding path program 1 times [2021-10-13 00:41:50,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:50,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886029079] [2021-10-13 00:41:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:50,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:50,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:50,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886029079] [2021-10-13 00:41:50,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886029079] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:50,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:50,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:41:50,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108007355] [2021-10-13 00:41:50,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:41:50,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:41:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:50,447 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-13 00:41:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:50,548 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-10-13 00:41:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:41:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-10-13 00:41:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:50,549 INFO L225 Difference]: With dead ends: 66 [2021-10-13 00:41:50,550 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 00:41:50,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 00:41:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-13 00:41:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 60 states have internal predecessors, (72), 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) [2021-10-13 00:41:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-10-13 00:41:50,556 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 11 [2021-10-13 00:41:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-10-13 00:41:50,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-13 00:41:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-10-13 00:41:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:41:50,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:50,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:50,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:41:50,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash 291262476, now seen corresponding path program 1 times [2021-10-13 00:41:50,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:50,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361530479] [2021-10-13 00:41:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:50,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:50,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:50,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361530479] [2021-10-13 00:41:50,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361530479] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:50,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:50,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:50,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451514145] [2021-10-13 00:41:50,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:41:50,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:41:50,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:50,630 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 00:41:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:50,738 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-13 00:41:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:41:50,739 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), 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 13 [2021-10-13 00:41:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:50,740 INFO L225 Difference]: With dead ends: 65 [2021-10-13 00:41:50,740 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 00:41:50,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 00:41:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-13 00:41:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 59 states have internal predecessors, (71), 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) [2021-10-13 00:41:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-10-13 00:41:50,746 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 13 [2021-10-13 00:41:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:50,746 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-10-13 00:41:50,747 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), 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) [2021-10-13 00:41:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-10-13 00:41:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:41:50,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:50,748 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:50,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:41:50,748 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash 291262528, now seen corresponding path program 1 times [2021-10-13 00:41:50,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:50,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867550378] [2021-10-13 00:41:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:50,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:50,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:50,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867550378] [2021-10-13 00:41:50,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867550378] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:50,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:50,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:41:50,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151786803] [2021-10-13 00:41:50,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:41:50,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:41:50,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:50,803 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 00:41:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:50,908 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-10-13 00:41:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-13 00:41:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:50,910 INFO L225 Difference]: With dead ends: 86 [2021-10-13 00:41:50,910 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 00:41:50,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 00:41:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-10-13 00:41:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 70 states have internal predecessors, (85), 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) [2021-10-13 00:41:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2021-10-13 00:41:50,917 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 13 [2021-10-13 00:41:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:50,917 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2021-10-13 00:41:50,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 00:41:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2021-10-13 00:41:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:41:50,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:50,919 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:50,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:41:50,919 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 348520830, now seen corresponding path program 1 times [2021-10-13 00:41:50,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:50,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995670848] [2021-10-13 00:41:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:50,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:50,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:50,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995670848] [2021-10-13 00:41:50,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995670848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:50,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:50,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:41:50,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580080948] [2021-10-13 00:41:50,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:41:50,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:50,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:41:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:50,961 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-13 00:41:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:51,052 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-10-13 00:41:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:41:51,053 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), 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 13 [2021-10-13 00:41:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:51,054 INFO L225 Difference]: With dead ends: 74 [2021-10-13 00:41:51,054 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 00:41:51,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 00:41:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-13 00:41:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.509090909090909) internal successors, (83), 68 states have internal predecessors, (83), 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) [2021-10-13 00:41:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-10-13 00:41:51,060 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 13 [2021-10-13 00:41:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-10-13 00:41:51,061 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), 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) [2021-10-13 00:41:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-10-13 00:41:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:41:51,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:51,062 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:41:51,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash 348520831, now seen corresponding path program 1 times [2021-10-13 00:41:51,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:51,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535585882] [2021-10-13 00:41:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:51,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:51,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:51,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535585882] [2021-10-13 00:41:51,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535585882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:51,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:51,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:41:51,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089497085] [2021-10-13 00:41:51,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:41:51,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:51,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:41:51,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:51,148 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-13 00:41:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:51,325 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2021-10-13 00:41:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-10-13 00:41:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:51,327 INFO L225 Difference]: With dead ends: 86 [2021-10-13 00:41:51,327 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 00:41:51,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:41:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 00:41:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-10-13 00:41:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 70 states have internal predecessors, (86), 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) [2021-10-13 00:41:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-10-13 00:41:51,333 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 13 [2021-10-13 00:41:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:51,333 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-10-13 00:41:51,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-13 00:41:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-10-13 00:41:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:41:51,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:51,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:51,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:41:51,335 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:51,335 INFO L82 PathProgramCache]: Analyzing trace with hash 439202164, now seen corresponding path program 1 times [2021-10-13 00:41:51,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:51,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243609061] [2021-10-13 00:41:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:51,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:51,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:51,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243609061] [2021-10-13 00:41:51,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243609061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:51,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:51,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:51,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855140664] [2021-10-13 00:41:51,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:41:51,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:41:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:51,391 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-13 00:41:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:51,490 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-10-13 00:41:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:41:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-10-13 00:41:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:51,492 INFO L225 Difference]: With dead ends: 75 [2021-10-13 00:41:51,492 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 00:41:51,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 00:41:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-13 00:41:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 states have internal predecessors, (85), 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) [2021-10-13 00:41:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-10-13 00:41:51,497 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 14 [2021-10-13 00:41:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:51,497 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-10-13 00:41:51,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-13 00:41:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-10-13 00:41:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:41:51,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:51,498 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:51,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:41:51,499 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1458990554, now seen corresponding path program 1 times [2021-10-13 00:41:51,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:51,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858161843] [2021-10-13 00:41:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:51,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:51,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:51,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858161843] [2021-10-13 00:41:51,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858161843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:51,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015482533] [2021-10-13 00:41:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:51,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:51,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:51,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:51,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:41:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:41:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:51,895 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:41:51,896 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 18 treesize of output 19 [2021-10-13 00:41:51,910 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 15 treesize of output 13 [2021-10-13 00:41:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015482533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:52,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:41:52,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-13 00:41:52,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595723914] [2021-10-13 00:41:52,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:41:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:41:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:41:52,096 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:52,336 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-10-13 00:41:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 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 15 [2021-10-13 00:41:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:52,338 INFO L225 Difference]: With dead ends: 95 [2021-10-13 00:41:52,338 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:41:52,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:41:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2021-10-13 00:41:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 64 states have internal predecessors, (77), 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) [2021-10-13 00:41:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-10-13 00:41:52,343 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 15 [2021-10-13 00:41:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:52,343 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-10-13 00:41:52,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-10-13 00:41:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:41:52,344 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:52,344 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:52,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:52,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:52,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1456928450, now seen corresponding path program 1 times [2021-10-13 00:41:52,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:52,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723326543] [2021-10-13 00:41:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:52,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:52,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:52,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723326543] [2021-10-13 00:41:52,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723326543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:52,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347522605] [2021-10-13 00:41:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:52,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:52,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:52,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:52,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:41:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:41:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:52,887 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:41:52,888 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 15 [2021-10-13 00:41:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:52,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347522605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:52,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:41:52,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-13 00:41:52,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643843728] [2021-10-13 00:41:52,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:41:53,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:53,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:41:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:53,001 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:53,199 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-10-13 00:41:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:41:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 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 17 [2021-10-13 00:41:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:53,200 INFO L225 Difference]: With dead ends: 78 [2021-10-13 00:41:53,200 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 00:41:53,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:41:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 00:41:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-10-13 00:41:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 61 states have internal predecessors, (73), 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) [2021-10-13 00:41:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-13 00:41:53,203 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-10-13 00:41:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:53,204 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-13 00:41:53,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-13 00:41:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:41:53,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:53,205 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] [2021-10-13 00:41:53,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:53,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 00:41:53,415 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncmpErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1817523924, now seen corresponding path program 1 times [2021-10-13 00:41:53,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:53,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386424706] [2021-10-13 00:41:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:53,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:53,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386424706] [2021-10-13 00:41:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386424706] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:53,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:53,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:41:53,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003521077] [2021-10-13 00:41:53,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:41:53,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:41:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:53,485 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-10-13 00:41:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:53,612 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-10-13 00:41:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:53,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 21 [2021-10-13 00:41:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:53,614 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:41:53,614 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 00:41:53,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 00:41:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-13 00:41:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 states have internal predecessors, (70), 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) [2021-10-13 00:41:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-10-13 00:41:53,618 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 21 [2021-10-13 00:41:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:53,618 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-10-13 00:41:53,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-10-13 00:41:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-10-13 00:41:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:41:53,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:53,621 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] [2021-10-13 00:41:53,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 00:41:53,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1817523925, now seen corresponding path program 1 times [2021-10-13 00:41:53,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:53,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419414443] [2021-10-13 00:41:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:53,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:53,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419414443] [2021-10-13 00:41:53,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419414443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:53,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:53,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:41:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391060385] [2021-10-13 00:41:53,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:41:53,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:41:53,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:53,732 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-10-13 00:41:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:53,936 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-10-13 00:41:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:41:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21 [2021-10-13 00:41:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:53,938 INFO L225 Difference]: With dead ends: 86 [2021-10-13 00:41:53,938 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 00:41:53,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:41:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 00:41:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2021-10-13 00:41:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.4) internal successors, (84), 67 states have internal predecessors, (84), 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) [2021-10-13 00:41:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-10-13 00:41:53,942 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 21 [2021-10-13 00:41:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:53,942 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-10-13 00:41:53,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-10-13 00:41:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-10-13 00:41:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:41:53,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:53,943 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, 1] [2021-10-13 00:41:53,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 00:41:53,943 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash 509312965, now seen corresponding path program 1 times [2021-10-13 00:41:53,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:53,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312092241] [2021-10-13 00:41:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:53,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:53,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-13 00:41:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312092241] [2021-10-13 00:41:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312092241] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:54,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:54,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:54,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749662667] [2021-10-13 00:41:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:41:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:41:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:54,006 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:41:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:54,087 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-13 00:41:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:41:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 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 22 [2021-10-13 00:41:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:54,089 INFO L225 Difference]: With dead ends: 72 [2021-10-13 00:41:54,089 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 00:41:54,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 00:41:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-13 00:41:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 60 states have internal predecessors, (74), 3 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) [2021-10-13 00:41:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-10-13 00:41:54,092 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 22 [2021-10-13 00:41:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:54,092 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-10-13 00:41:54,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:41:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-10-13 00:41:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:41:54,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:54,093 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, 1] [2021-10-13 00:41:54,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 00:41:54,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncmpErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash 508666854, now seen corresponding path program 1 times [2021-10-13 00:41:54,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:54,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809113175] [2021-10-13 00:41:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:54,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809113175] [2021-10-13 00:41:54,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809113175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:54,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:54,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:41:54,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343009306] [2021-10-13 00:41:54,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:41:54,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:41:54,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:41:54,137 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-13 00:41:54,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:54,228 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-10-13 00:41:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:41:54,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2021-10-13 00:41:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:54,230 INFO L225 Difference]: With dead ends: 63 [2021-10-13 00:41:54,230 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 00:41:54,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 00:41:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-13 00:41:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 3 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) [2021-10-13 00:41:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-10-13 00:41:54,234 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 22 [2021-10-13 00:41:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:54,234 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-10-13 00:41:54,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-13 00:41:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-10-13 00:41:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:41:54,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:54,235 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, 1] [2021-10-13 00:41:54,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 00:41:54,236 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash 508666855, now seen corresponding path program 1 times [2021-10-13 00:41:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:54,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017935014] [2021-10-13 00:41:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:54,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017935014] [2021-10-13 00:41:54,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017935014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:54,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:54,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:41:54,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089347864] [2021-10-13 00:41:54,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:41:54,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:41:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:41:54,355 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-13 00:41:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:54,516 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-10-13 00:41:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:41:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 22 [2021-10-13 00:41:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:54,518 INFO L225 Difference]: With dead ends: 67 [2021-10-13 00:41:54,518 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 00:41:54,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:41:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 00:41:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-10-13 00:41:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 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) [2021-10-13 00:41:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-13 00:41:54,520 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 22 [2021-10-13 00:41:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:54,521 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-13 00:41:54,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-13 00:41:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-13 00:41:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:41:54,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:54,522 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:54,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 00:41:54,522 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2007435023, now seen corresponding path program 1 times [2021-10-13 00:41:54,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:54,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908566598] [2021-10-13 00:41:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:54,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908566598] [2021-10-13 00:41:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908566598] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:54,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:54,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:54,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498952626] [2021-10-13 00:41:54,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:41:54,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:41:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:54,557 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:54,621 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-10-13 00:41:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:41:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 2 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 26 [2021-10-13 00:41:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:54,622 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:41:54,623 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 00:41:54,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 00:41:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-13 00:41:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 58 states have internal predecessors, (68), 3 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) [2021-10-13 00:41:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-13 00:41:54,625 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 26 [2021-10-13 00:41:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:54,626 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-13 00:41:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-13 00:41:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 00:41:54,627 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:54,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:54,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 00:41:54,628 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash 489090044, now seen corresponding path program 1 times [2021-10-13 00:41:54,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:54,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928125952] [2021-10-13 00:41:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:54,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928125952] [2021-10-13 00:41:54,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928125952] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:54,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:54,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:41:54,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48887368] [2021-10-13 00:41:54,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:41:54,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:41:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:41:54,670 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:54,731 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-10-13 00:41:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:41:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 2 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 29 [2021-10-13 00:41:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:54,732 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:41:54,732 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 00:41:54,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:41:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 00:41:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-13 00:41:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 58 states have internal predecessors, (66), 3 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) [2021-10-13 00:41:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-10-13 00:41:54,735 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 29 [2021-10-13 00:41:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:54,735 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-10-13 00:41:54,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-10-13 00:41:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:41:54,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:54,737 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:54,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 00:41:54,737 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash -859100191, now seen corresponding path program 1 times [2021-10-13 00:41:54,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:54,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816508640] [2021-10-13 00:41:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:54,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:54,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:54,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816508640] [2021-10-13 00:41:54,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816508640] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:54,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:54,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 00:41:54,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516950786] [2021-10-13 00:41:54,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:41:54,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:41:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:41:54,883 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-10-13 00:41:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:55,140 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-10-13 00:41:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:41:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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 31 [2021-10-13 00:41:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:55,141 INFO L225 Difference]: With dead ends: 86 [2021-10-13 00:41:55,141 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 00:41:55,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:41:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 00:41:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-13 00:41:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 53 states have internal predecessors, (59), 3 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) [2021-10-13 00:41:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-10-13 00:41:55,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 31 [2021-10-13 00:41:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:55,144 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-10-13 00:41:55,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-10-13 00:41:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-10-13 00:41:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:41:55,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:55,145 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:55,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 00:41:55,145 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash -718551581, now seen corresponding path program 1 times [2021-10-13 00:41:55,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:55,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61707962] [2021-10-13 00:41:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:55,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:55,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:55,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61707962] [2021-10-13 00:41:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61707962] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:55,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:55,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 00:41:55,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642698312] [2021-10-13 00:41:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:41:55,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:41:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:41:55,325 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-10-13 00:41:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:55,589 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-10-13 00:41:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:41:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 31 [2021-10-13 00:41:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:55,591 INFO L225 Difference]: With dead ends: 89 [2021-10-13 00:41:55,591 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 00:41:55,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:41:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 00:41:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-13 00:41:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 3 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) [2021-10-13 00:41:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-10-13 00:41:55,593 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 31 [2021-10-13 00:41:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:55,594 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-10-13 00:41:55,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-10-13 00:41:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-10-13 00:41:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 00:41:55,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:55,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:55,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 00:41:55,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2071968550, now seen corresponding path program 1 times [2021-10-13 00:41:55,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:55,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606805668] [2021-10-13 00:41:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:55,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:55,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:55,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606805668] [2021-10-13 00:41:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606805668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:55,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491970407] [2021-10-13 00:41:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:55,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:55,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:55,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:41:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:41:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:55,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:41:56,328 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:41:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-10-13 00:41:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:41:56,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491970407] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:56,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:41:56,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-10-13 00:41:56,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209552505] [2021-10-13 00:41:56,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:41:56,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:41:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:41:56,380 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:56,696 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-10-13 00:41:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:41:56,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 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 35 [2021-10-13 00:41:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:56,697 INFO L225 Difference]: With dead ends: 76 [2021-10-13 00:41:56,697 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 00:41:56,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:41:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 00:41:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-13 00:41:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.186046511627907) internal successors, (51), 47 states have internal predecessors, (51), 3 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) [2021-10-13 00:41:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-13 00:41:56,700 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-10-13 00:41:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:56,700 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-13 00:41:56,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-13 00:41:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 00:41:56,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:56,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:56,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:56,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:56,911 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1562495460, now seen corresponding path program 1 times [2021-10-13 00:41:56,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:56,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662882494] [2021-10-13 00:41:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:56,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:57,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:57,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:57,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662882494] [2021-10-13 00:41:57,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662882494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:57,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135140901] [2021-10-13 00:41:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:57,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:57,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:57,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:41:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:41:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:41:57,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135140901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:57,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:41:57,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-13 00:41:57,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533762221] [2021-10-13 00:41:57,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:41:57,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:57,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:41:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:41:57,463 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:57,724 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-10-13 00:41:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:41:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-13 00:41:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:57,725 INFO L225 Difference]: With dead ends: 73 [2021-10-13 00:41:57,725 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 00:41:57,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:41:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 00:41:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-10-13 00:41:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 3 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) [2021-10-13 00:41:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-10-13 00:41:57,728 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 35 [2021-10-13 00:41:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:57,729 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-10-13 00:41:57,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-10-13 00:41:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:41:57,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:57,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:57,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 00:41:57,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:57,946 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1192719032, now seen corresponding path program 1 times [2021-10-13 00:41:57,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:57,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003476394] [2021-10-13 00:41:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:57,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:58,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:41:58,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:58,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003476394] [2021-10-13 00:41:58,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003476394] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:41:58,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:41:58,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-13 00:41:58,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883210447] [2021-10-13 00:41:58,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:41:58,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:41:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:41:58,182 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-10-13 00:41:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:58,555 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-10-13 00:41:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:41:58,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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 36 [2021-10-13 00:41:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:58,558 INFO L225 Difference]: With dead ends: 84 [2021-10-13 00:41:58,558 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 00:41:58,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:41:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 00:41:58,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-10-13 00:41:58,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 3 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) [2021-10-13 00:41:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-13 00:41:58,561 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 36 [2021-10-13 00:41:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:58,562 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-13 00:41:58,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-10-13 00:41:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-13 00:41:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:41:58,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:58,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:58,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 00:41:58,563 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1073097963, now seen corresponding path program 1 times [2021-10-13 00:41:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:58,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319648411] [2021-10-13 00:41:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:58,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:58,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:41:58,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:58,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319648411] [2021-10-13 00:41:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319648411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:58,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007664444] [2021-10-13 00:41:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:58,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:58,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:58,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:41:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:41:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:41:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:41:59,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007664444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:59,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:41:59,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-13 00:41:59,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24893983] [2021-10-13 00:41:59,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:41:59,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:41:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:41:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:41:59,168 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:41:59,448 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-10-13 00:41:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:41:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-13 00:41:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:41:59,449 INFO L225 Difference]: With dead ends: 72 [2021-10-13 00:41:59,449 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 00:41:59,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:41:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 00:41:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-10-13 00:41:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 58 states have internal predecessors, (62), 3 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) [2021-10-13 00:41:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-10-13 00:41:59,452 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 40 [2021-10-13 00:41:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:41:59,452 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-10-13 00:41:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:41:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-10-13 00:41:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:41:59,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:41:59,453 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:41:59,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:41:59,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 00:41:59,663 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:41:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:41:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash -83218317, now seen corresponding path program 1 times [2021-10-13 00:41:59,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:41:59,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700641497] [2021-10-13 00:41:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:59,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:41:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:41:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:41:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:41:59,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:41:59,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700641497] [2021-10-13 00:41:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700641497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:41:59,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38221703] [2021-10-13 00:41:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:41:59,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:41:59,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:41:59,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:41:59,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:42:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:42:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:00,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:42:01,551 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-13 00:42:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-10-13 00:42:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:42:01,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38221703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:01,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:01,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-10-13 00:42:01,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093344501] [2021-10-13 00:42:01,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:42:01,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:42:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:42:01,628 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:05,432 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2021-10-13 00:42:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 00:42:05,432 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-13 00:42:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:05,433 INFO L225 Difference]: With dead ends: 168 [2021-10-13 00:42:05,433 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 00:42:05,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2050.6ms TimeCoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 00:42:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 00:42:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-13 00:42:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 3 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) [2021-10-13 00:42:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-10-13 00:42:05,438 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 49 [2021-10-13 00:42:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:05,438 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-10-13 00:42:05,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-10-13 00:42:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-13 00:42:05,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:05,440 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-10-13 00:42:05,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:05,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:05,656 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2107871545, now seen corresponding path program 2 times [2021-10-13 00:42:05,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:05,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491824122] [2021-10-13 00:42:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:05,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:05,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:42:05,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:05,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491824122] [2021-10-13 00:42:05,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491824122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:05,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79984667] [2021-10-13 00:42:05,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:42:05,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:05,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:05,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:42:06,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:42:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:42:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:42:06,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79984667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:06,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:06,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 00:42:06,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349004036] [2021-10-13 00:42:06,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:42:06,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:42:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:42:06,365 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:06,748 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-10-13 00:42:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:42:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-10-13 00:42:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:06,750 INFO L225 Difference]: With dead ends: 89 [2021-10-13 00:42:06,750 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 00:42:06,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:42:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 00:42:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-10-13 00:42:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 78 states have internal predecessors, (85), 3 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) [2021-10-13 00:42:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-10-13 00:42:06,753 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 57 [2021-10-13 00:42:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:06,753 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-10-13 00:42:06,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 15 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-10-13 00:42:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 00:42:06,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:06,755 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-10-13 00:42:06,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:06,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:42:06,967 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash 919508483, now seen corresponding path program 2 times [2021-10-13 00:42:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:06,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559370003] [2021-10-13 00:42:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:06,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:42:07,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:07,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559370003] [2021-10-13 00:42:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559370003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:07,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388708037] [2021-10-13 00:42:07,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:42:07,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:07,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:07,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:07,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:42:07,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:42:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:42:07,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:07,427 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:07,427 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 15 [2021-10-13 00:42:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:42:07,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388708037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:07,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:07,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-13 00:42:07,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073318404] [2021-10-13 00:42:07,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:42:07,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:42:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:42:07,896 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:08,224 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-10-13 00:42:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:42:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-10-13 00:42:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:08,225 INFO L225 Difference]: With dead ends: 87 [2021-10-13 00:42:08,225 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 00:42:08,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:42:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 00:42:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-10-13 00:42:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 76 states have internal predecessors, (80), 3 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) [2021-10-13 00:42:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-10-13 00:42:08,229 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 58 [2021-10-13 00:42:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:08,229 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-10-13 00:42:08,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-10-13 00:42:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 00:42:08,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:08,230 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:08,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:08,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:42:08,439 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:08,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1530472123, now seen corresponding path program 3 times [2021-10-13 00:42:08,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:08,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67509090] [2021-10-13 00:42:08,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:08,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:08,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:42:08,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:08,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67509090] [2021-10-13 00:42:08,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67509090] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:08,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389092990] [2021-10-13 00:42:08,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:42:08,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:08,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:08,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:08,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:42:09,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 00:42:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:42:09,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:09,154 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:09,154 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 15 [2021-10-13 00:42:09,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 00:42:09,921 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 34 treesize of output 28 [2021-10-13 00:42:10,423 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 00:42:10,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-10-13 00:42:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:42:10,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389092990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:10,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:10,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-10-13 00:42:10,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011756499] [2021-10-13 00:42:10,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:42:10,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:42:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:42:10,439 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:13,637 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2021-10-13 00:42:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-13 00:42:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-10-13 00:42:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:13,639 INFO L225 Difference]: With dead ends: 220 [2021-10-13 00:42:13,639 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:42:13,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2800.7ms TimeCoverageRelationStatistics Valid=586, Invalid=4525, Unknown=1, NotChecked=0, Total=5112 [2021-10-13 00:42:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:42:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-10-13 00:42:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.1) internal successors, (88), 84 states have internal predecessors, (88), 3 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) [2021-10-13 00:42:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-10-13 00:42:13,644 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 67 [2021-10-13 00:42:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-10-13 00:42:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 27 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-10-13 00:42:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 00:42:13,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:13,646 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:13,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:13,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:42:13,870 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:13,871 INFO L82 PathProgramCache]: Analyzing trace with hash -816089973, now seen corresponding path program 4 times [2021-10-13 00:42:13,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:13,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946703225] [2021-10-13 00:42:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:13,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:14,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:42:14,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:14,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946703225] [2021-10-13 00:42:14,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946703225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:14,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563369463] [2021-10-13 00:42:14,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:42:14,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:14,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:14,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:14,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:42:14,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:42:14,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 00:42:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:14,420 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 [2021-10-13 00:42:14,425 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 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-13 00:42:15,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:42:15,106 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-13 00:42:15,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-13 00:42:16,245 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-13 00:42:16,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-10-13 00:42:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:42:16,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563369463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:16,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:16,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2021-10-13 00:42:16,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110141876] [2021-10-13 00:42:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:42:16,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:42:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:42:16,425 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:17,595 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-10-13 00:42:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:42:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-10-13 00:42:17,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:17,596 INFO L225 Difference]: With dead ends: 107 [2021-10-13 00:42:17,596 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 00:42:17,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:42:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 00:42:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-10-13 00:42:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 96 states have internal predecessors, (103), 3 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) [2021-10-13 00:42:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-10-13 00:42:17,600 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 75 [2021-10-13 00:42:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:17,601 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-10-13 00:42:17,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 24 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-10-13 00:42:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 00:42:17,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:17,602 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:17,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:17,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 00:42:17,806 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash 471014641, now seen corresponding path program 3 times [2021-10-13 00:42:17,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:17,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448256212] [2021-10-13 00:42:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:17,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:17,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:42:17,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:17,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448256212] [2021-10-13 00:42:17,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448256212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:17,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53373096] [2021-10-13 00:42:17,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:42:17,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:17,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:17,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:42:18,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 00:42:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:18,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:42:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:18,490 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:18,491 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 15 [2021-10-13 00:42:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:42:19,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53373096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:19,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:19,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-13 00:42:19,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675813587] [2021-10-13 00:42:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:42:19,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:42:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:42:19,073 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:19,637 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-10-13 00:42:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:42:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-10-13 00:42:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:19,639 INFO L225 Difference]: With dead ends: 105 [2021-10-13 00:42:19,639 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 00:42:19,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:42:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 00:42:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-10-13 00:42:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 94 states have internal predecessors, (98), 3 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) [2021-10-13 00:42:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-10-13 00:42:19,643 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 76 [2021-10-13 00:42:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:19,644 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-10-13 00:42:19,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.166666666666667) internal successors, (124), 22 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-10-13 00:42:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 00:42:19,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:19,671 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:19,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:19,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:42:19,871 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash -109036009, now seen corresponding path program 5 times [2021-10-13 00:42:19,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:19,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923353957] [2021-10-13 00:42:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:19,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:42:20,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:20,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923353957] [2021-10-13 00:42:20,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923353957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:20,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436839151] [2021-10-13 00:42:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:42:20,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:20,203 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:20,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:42:20,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 00:42:20,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 00:42:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:20,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:42:22,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:42:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:42:22,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436839151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:22,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:22,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 32 [2021-10-13 00:42:22,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189211644] [2021-10-13 00:42:22,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 00:42:22,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 00:42:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:42:22,077 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:25,674 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2021-10-13 00:42:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 00:42:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-10-13 00:42:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:25,676 INFO L225 Difference]: With dead ends: 272 [2021-10-13 00:42:25,676 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 00:42:25,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2080.1ms TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-10-13 00:42:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 00:42:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-10-13 00:42:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 102 states have internal predecessors, (106), 3 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) [2021-10-13 00:42:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-10-13 00:42:25,681 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 85 [2021-10-13 00:42:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:25,681 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-10-13 00:42:25,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.21875) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-10-13 00:42:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 00:42:25,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:25,683 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:25,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:25,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:25,890 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:25,891 INFO L82 PathProgramCache]: Analyzing trace with hash -171019299, now seen corresponding path program 6 times [2021-10-13 00:42:25,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:25,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486158900] [2021-10-13 00:42:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:25,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:42:26,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:26,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486158900] [2021-10-13 00:42:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486158900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:26,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561983423] [2021-10-13 00:42:26,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:42:26,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:26,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:26,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:26,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:42:26,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 00:42:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 00:42:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:26,707 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:26,707 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 15 [2021-10-13 00:42:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 00:42:28,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:42:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-10-13 00:42:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:42:28,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561983423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:28,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:28,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-10-13 00:42:28,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016087054] [2021-10-13 00:42:28,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:42:28,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:42:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:42:28,946 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:30,383 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-10-13 00:42:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:42:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-10-13 00:42:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:30,384 INFO L225 Difference]: With dead ends: 125 [2021-10-13 00:42:30,384 INFO L226 Difference]: Without dead ends: 125 [2021-10-13 00:42:30,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1110.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:42:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-13 00:42:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2021-10-13 00:42:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.1) internal successors, (121), 114 states have internal predecessors, (121), 3 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) [2021-10-13 00:42:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2021-10-13 00:42:30,389 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 93 [2021-10-13 00:42:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:30,389 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2021-10-13 00:42:30,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.172413793103448) internal successors, (150), 27 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2021-10-13 00:42:30,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-13 00:42:30,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:30,391 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:30,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:30,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:30,614 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1006630945, now seen corresponding path program 4 times [2021-10-13 00:42:30,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:30,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136042947] [2021-10-13 00:42:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:30,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:30,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:42:30,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:30,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136042947] [2021-10-13 00:42:30,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136042947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:30,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899105959] [2021-10-13 00:42:30,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:42:30,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:30,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:30,882 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:30,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:42:31,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:42:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-13 00:42:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:31,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:31,826 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 15 [2021-10-13 00:42:32,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:42:33,073 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-10-13 00:42:33,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-10-13 00:42:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:42:33,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899105959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:33,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:33,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 31 [2021-10-13 00:42:33,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048528732] [2021-10-13 00:42:33,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 00:42:33,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 00:42:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:42:33,284 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:34,614 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-10-13 00:42:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 00:42:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-10-13 00:42:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:34,615 INFO L225 Difference]: With dead ends: 123 [2021-10-13 00:42:34,615 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 00:42:34,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1106.9ms TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 00:42:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 00:42:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-10-13 00:42:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 112 states have internal predecessors, (116), 3 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) [2021-10-13 00:42:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-10-13 00:42:34,619 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 94 [2021-10-13 00:42:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:34,620 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-10-13 00:42:34,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.451612903225806) internal successors, (138), 29 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-10-13 00:42:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-13 00:42:34,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:34,621 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:34,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:34,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:34,842 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1195262231, now seen corresponding path program 7 times [2021-10-13 00:42:34,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:34,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382384036] [2021-10-13 00:42:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:34,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:42:35,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:35,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382384036] [2021-10-13 00:42:35,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382384036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:35,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972628918] [2021-10-13 00:42:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:42:35,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:35,279 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:35,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:42:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:36,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-13 00:42:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:42:38,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:42:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:42:38,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972628918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:38,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:38,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 36 [2021-10-13 00:42:38,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510713370] [2021-10-13 00:42:38,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:42:38,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:42:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1186, Unknown=1, NotChecked=0, Total=1260 [2021-10-13 00:42:38,452 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:42,853 INFO L93 Difference]: Finished difference Result 324 states and 328 transitions. [2021-10-13 00:42:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 00:42:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-10-13 00:42:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:42,854 INFO L225 Difference]: With dead ends: 324 [2021-10-13 00:42:42,854 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 00:42:42,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 4024.0ms TimeCoverageRelationStatistics Valid=492, Invalid=6148, Unknown=2, NotChecked=0, Total=6642 [2021-10-13 00:42:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 00:42:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-10-13 00:42:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 120 states have internal predecessors, (124), 3 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) [2021-10-13 00:42:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-10-13 00:42:42,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 103 [2021-10-13 00:42:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:42,860 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-10-13 00:42:42,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.527777777777778) internal successors, (163), 33 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-10-13 00:42:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-13 00:42:42,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:42,861 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:42,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:43,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-13 00:42:43,062 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1001385775, now seen corresponding path program 8 times [2021-10-13 00:42:43,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:43,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627163750] [2021-10-13 00:42:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:43,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:43,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 00:42:43,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:43,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627163750] [2021-10-13 00:42:43,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627163750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:43,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301229270] [2021-10-13 00:42:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:42:43,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:43,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:43,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:42:44,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:42:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 00:42:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 00:42:44,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301229270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:44,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:44,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-10-13 00:42:44,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280284082] [2021-10-13 00:42:44,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:42:44,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:42:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:42:44,694 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:45,300 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-10-13 00:42:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:42:45,301 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-10-13 00:42:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:45,302 INFO L225 Difference]: With dead ends: 143 [2021-10-13 00:42:45,302 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 00:42:45,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:42:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 00:42:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-10-13 00:42:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.0859375) internal successors, (139), 132 states have internal predecessors, (139), 3 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) [2021-10-13 00:42:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2021-10-13 00:42:45,306 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 111 [2021-10-13 00:42:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:45,307 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2021-10-13 00:42:45,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 24 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2021-10-13 00:42:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-13 00:42:45,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:45,309 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:45,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:45,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 00:42:45,522 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:45,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:45,523 INFO L82 PathProgramCache]: Analyzing trace with hash 978187981, now seen corresponding path program 5 times [2021-10-13 00:42:45,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:45,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651786385] [2021-10-13 00:42:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:45,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:45,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 00:42:45,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:45,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651786385] [2021-10-13 00:42:45,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651786385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:45,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44072695] [2021-10-13 00:42:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:42:45,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:45,795 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:45,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:42:46,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 00:42:46,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:46,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 00:42:46,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:46,706 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:46,706 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 15 [2021-10-13 00:42:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 00:42:47,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44072695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:47,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:47,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 24 [2021-10-13 00:42:47,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998151550] [2021-10-13 00:42:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:42:47,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:42:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:42:47,429 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:48,095 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2021-10-13 00:42:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:42:48,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-10-13 00:42:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:48,097 INFO L225 Difference]: With dead ends: 141 [2021-10-13 00:42:48,097 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 00:42:48,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:42:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 00:42:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-10-13 00:42:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 130 states have internal predecessors, (134), 3 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) [2021-10-13 00:42:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2021-10-13 00:42:48,102 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 112 [2021-10-13 00:42:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:48,102 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2021-10-13 00:42:48,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.416666666666667) internal successors, (154), 23 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2021-10-13 00:42:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-13 00:42:48,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:48,105 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:48,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:48,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-13 00:42:48,315 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1820769211, now seen corresponding path program 9 times [2021-10-13 00:42:48,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:48,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604081542] [2021-10-13 00:42:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:48,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:48,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 00:42:48,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:48,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604081542] [2021-10-13 00:42:48,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604081542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:48,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123820754] [2021-10-13 00:42:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:42:48,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:48,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:48,858 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:48,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:42:49,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 00:42:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 00:42:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:50,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:42:51,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:42:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 00:42:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123820754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:51,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:51,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 40 [2021-10-13 00:42:51,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140371549] [2021-10-13 00:42:51,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:42:51,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:42:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:42:51,813 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:56,304 INFO L93 Difference]: Finished difference Result 376 states and 380 transitions. [2021-10-13 00:42:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-13 00:42:56,305 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-10-13 00:42:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:42:56,306 INFO L225 Difference]: With dead ends: 376 [2021-10-13 00:42:56,306 INFO L226 Difference]: Without dead ends: 149 [2021-10-13 00:42:56,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 3100.0ms TimeCoverageRelationStatistics Valid=530, Invalid=7480, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 00:42:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-13 00:42:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2021-10-13 00:42:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 138 states have internal predecessors, (142), 3 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) [2021-10-13 00:42:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2021-10-13 00:42:56,313 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 121 [2021-10-13 00:42:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:42:56,313 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2021-10-13 00:42:56,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.775) internal successors, (191), 37 states have internal predecessors, (191), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:42:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2021-10-13 00:42:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-13 00:42:56,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:42:56,314 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:56,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:56,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-13 00:42:56,515 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:42:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1138538879, now seen corresponding path program 10 times [2021-10-13 00:42:56,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:56,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732963228] [2021-10-13 00:42:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:56,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:42:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-13 00:42:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:56,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732963228] [2021-10-13 00:42:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732963228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:56,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685506610] [2021-10-13 00:42:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:42:56,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:56,879 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:56,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:42:57,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:42:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:42:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:42:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:58,002 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:42:58,002 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 15 [2021-10-13 00:42:58,012 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 [2021-10-13 00:42:59,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:42:59,154 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-13 00:42:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-13 00:43:00,969 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-13 00:43:00,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-10-13 00:43:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 50 proven. 184 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-13 00:43:01,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685506610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:01,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:01,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2021-10-13 00:43:01,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651458952] [2021-10-13 00:43:01,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:43:01,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:01,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:43:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:43:01,182 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:03,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:03,613 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-10-13 00:43:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 00:43:03,613 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-10-13 00:43:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:03,615 INFO L225 Difference]: With dead ends: 161 [2021-10-13 00:43:03,615 INFO L226 Difference]: Without dead ends: 161 [2021-10-13 00:43:03,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1671.2ms TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 00:43:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-13 00:43:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-10-13 00:43:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 146 states have (on average 1.0753424657534247) internal successors, (157), 150 states have internal predecessors, (157), 3 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) [2021-10-13 00:43:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2021-10-13 00:43:03,620 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 129 [2021-10-13 00:43:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:03,621 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2021-10-13 00:43:03,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.421052631578948) internal successors, (206), 36 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2021-10-13 00:43:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-13 00:43:03,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:03,623 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:03,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:03,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 00:43:03,843 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash -934966853, now seen corresponding path program 6 times [2021-10-13 00:43:03,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:03,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397346158] [2021-10-13 00:43:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:03,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-13 00:43:04,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:04,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397346158] [2021-10-13 00:43:04,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397346158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:04,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908027606] [2021-10-13 00:43:04,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:43:04,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:04,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:04,203 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:04,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:43:05,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 00:43:05,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:43:05,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 00:43:05,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:05,836 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:43:05,840 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 15 [2021-10-13 00:43:06,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 00:43:06,524 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-10-13 00:43:06,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-10-13 00:43:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-10-13 00:43:06,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908027606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:06,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:06,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-10-13 00:43:06,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236615317] [2021-10-13 00:43:06,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:43:06,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:43:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:43:06,678 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:08,886 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-10-13 00:43:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 00:43:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-10-13 00:43:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:08,888 INFO L225 Difference]: With dead ends: 153 [2021-10-13 00:43:08,888 INFO L226 Difference]: Without dead ends: 149 [2021-10-13 00:43:08,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1859.9ms TimeCoverageRelationStatistics Valid=621, Invalid=4209, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 00:43:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-13 00:43:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-10-13 00:43:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 144 states have internal predecessors, (148), 3 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) [2021-10-13 00:43:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-10-13 00:43:08,893 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 130 [2021-10-13 00:43:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:08,894 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-10-13 00:43:08,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.827586206896552) internal successors, (140), 27 states have internal predecessors, (140), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-10-13 00:43:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-13 00:43:08,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:08,896 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:08,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 00:43:09,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 00:43:09,102 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1556441971, now seen corresponding path program 11 times [2021-10-13 00:43:09,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:09,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116366875] [2021-10-13 00:43:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:09,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:09,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-13 00:43:09,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116366875] [2021-10-13 00:43:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116366875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864949735] [2021-10-13 00:43:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:43:09,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:09,570 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:09,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:43:10,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 00:43:10,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:43:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:43:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:11,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:43:12,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:43:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-13 00:43:12,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864949735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:12,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:12,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 44 [2021-10-13 00:43:12,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595853553] [2021-10-13 00:43:12,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 00:43:12,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:12,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 00:43:12,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:43:12,721 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:17,915 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2021-10-13 00:43:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-13 00:43:17,916 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-10-13 00:43:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:17,917 INFO L225 Difference]: With dead ends: 424 [2021-10-13 00:43:17,917 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 00:43:17,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 3206.4ms TimeCoverageRelationStatistics Valid=568, Invalid=8938, Unknown=0, NotChecked=0, Total=9506 [2021-10-13 00:43:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 00:43:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-10-13 00:43:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.04) internal successors, (156), 152 states have internal predecessors, (156), 3 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) [2021-10-13 00:43:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-10-13 00:43:17,921 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 139 [2021-10-13 00:43:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:17,921 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-10-13 00:43:17,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 41 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-10-13 00:43:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-13 00:43:17,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:17,924 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:17,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:18,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 00:43:18,138 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash 482073043, now seen corresponding path program 12 times [2021-10-13 00:43:18,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:18,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556480641] [2021-10-13 00:43:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:18,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:18,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 45 proven. 277 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 00:43:18,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:18,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556480641] [2021-10-13 00:43:18,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556480641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:18,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997348090] [2021-10-13 00:43:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:43:18,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:18,555 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:18,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:43:20,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 00:43:20,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:43:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 00:43:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:20,409 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:43:20,409 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 18 treesize of output 19 [2021-10-13 00:43:20,411 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 15 treesize of output 13 [2021-10-13 00:43:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 256 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 00:43:21,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997348090] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:21,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:21,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-10-13 00:43:21,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017046342] [2021-10-13 00:43:21,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:43:21,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:43:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:43:21,633 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:22,929 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2021-10-13 00:43:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:43:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-10-13 00:43:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:22,932 INFO L225 Difference]: With dead ends: 171 [2021-10-13 00:43:22,933 INFO L226 Difference]: Without dead ends: 169 [2021-10-13 00:43:22,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=349, Invalid=2731, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 00:43:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-13 00:43:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-10-13 00:43:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 3 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) [2021-10-13 00:43:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2021-10-13 00:43:22,937 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 147 [2021-10-13 00:43:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:22,938 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2021-10-13 00:43:22,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 6.157894736842105) internal successors, (234), 36 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2021-10-13 00:43:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-13 00:43:22,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:22,939 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:22,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 00:43:23,146 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:23,147 INFO L82 PathProgramCache]: Analyzing trace with hash 699967839, now seen corresponding path program 13 times [2021-10-13 00:43:23,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:23,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743315202] [2021-10-13 00:43:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:23,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 00:43:23,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:23,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743315202] [2021-10-13 00:43:23,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743315202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:23,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478142109] [2021-10-13 00:43:23,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:43:23,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:23,683 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:23,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:43:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:25,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 00:43:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:43:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:43:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 00:43:27,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478142109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:27,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:27,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 48 [2021-10-13 00:43:27,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467916219] [2021-10-13 00:43:27,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-13 00:43:27,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-13 00:43:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:43:27,244 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:33,327 INFO L93 Difference]: Finished difference Result 476 states and 480 transitions. [2021-10-13 00:43:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-13 00:43:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-10-13 00:43:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:33,329 INFO L225 Difference]: With dead ends: 476 [2021-10-13 00:43:33,329 INFO L226 Difference]: Without dead ends: 181 [2021-10-13 00:43:33,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 3771.8ms TimeCoverageRelationStatistics Valid=606, Invalid=10524, Unknown=0, NotChecked=0, Total=11130 [2021-10-13 00:43:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-13 00:43:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-10-13 00:43:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 170 states have internal predecessors, (174), 3 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) [2021-10-13 00:43:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-10-13 00:43:33,335 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 157 [2021-10-13 00:43:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:33,336 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-10-13 00:43:33,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.145833333333333) internal successors, (247), 45 states have internal predecessors, (247), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-10-13 00:43:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-13 00:43:33,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:33,337 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:33,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-13 00:43:33,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:33,542 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1199376677, now seen corresponding path program 14 times [2021-10-13 00:43:33,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:33,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845970286] [2021-10-13 00:43:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:33,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:33,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 358 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-13 00:43:33,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:33,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845970286] [2021-10-13 00:43:33,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845970286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:33,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637971958] [2021-10-13 00:43:33,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:43:33,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:33,979 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:34,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:43:35,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:43:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:43:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 00:43:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-13 00:43:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637971958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:36,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-10-13 00:43:36,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415801878] [2021-10-13 00:43:36,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:43:36,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:43:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:43:36,528 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:37,736 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2021-10-13 00:43:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:43:37,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-10-13 00:43:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:37,737 INFO L225 Difference]: With dead ends: 189 [2021-10-13 00:43:37,737 INFO L226 Difference]: Without dead ends: 187 [2021-10-13 00:43:37,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:43:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-13 00:43:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-10-13 00:43:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.0337078651685394) internal successors, (184), 180 states have internal predecessors, (184), 3 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) [2021-10-13 00:43:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2021-10-13 00:43:37,745 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 165 [2021-10-13 00:43:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:37,745 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2021-10-13 00:43:37,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 33 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2021-10-13 00:43:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-13 00:43:37,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:37,747 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:37,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:37,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-13 00:43:37,966 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1162631729, now seen corresponding path program 15 times [2021-10-13 00:43:37,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:37,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088547960] [2021-10-13 00:43:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:37,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:38,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-13 00:43:38,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:38,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088547960] [2021-10-13 00:43:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088547960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:38,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785038520] [2021-10-13 00:43:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:43:38,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:38,576 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:38,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:43:40,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 00:43:40,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:43:40,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-13 00:43:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:43:43,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:43:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-13 00:43:43,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785038520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:43,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:43,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 52 [2021-10-13 00:43:43,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331105035] [2021-10-13 00:43:43,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-13 00:43:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-13 00:43:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:43:43,349 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:50,658 INFO L93 Difference]: Finished difference Result 528 states and 532 transitions. [2021-10-13 00:43:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-13 00:43:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-10-13 00:43:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:43:50,660 INFO L225 Difference]: With dead ends: 528 [2021-10-13 00:43:50,660 INFO L226 Difference]: Without dead ends: 199 [2021-10-13 00:43:50,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 4538.5ms TimeCoverageRelationStatistics Valid=644, Invalid=12238, Unknown=0, NotChecked=0, Total=12882 [2021-10-13 00:43:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-13 00:43:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2021-10-13 00:43:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.032258064516129) internal successors, (192), 188 states have internal predecessors, (192), 3 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) [2021-10-13 00:43:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-10-13 00:43:50,667 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 175 [2021-10-13 00:43:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:43:50,667 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-10-13 00:43:50,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.288461538461538) internal successors, (275), 49 states have internal predecessors, (275), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:43:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-10-13 00:43:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-10-13 00:43:50,669 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:43:50,669 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:43:50,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:50,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-13 00:43:50,879 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:43:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash 618280055, now seen corresponding path program 16 times [2021-10-13 00:43:50,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:43:50,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431862990] [2021-10-13 00:43:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:43:50,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:43:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:43:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-13 00:43:51,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:43:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431862990] [2021-10-13 00:43:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431862990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:51,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949744295] [2021-10-13 00:43:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:43:51,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:43:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:51,415 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:43:51,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 00:43:53,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:43:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:43:53,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-13 00:43:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:53,390 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:43:53,391 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 15 [2021-10-13 00:43:53,398 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 [2021-10-13 00:43:54,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:43:54,916 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-13 00:43:54,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-13 00:43:57,595 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-13 00:43:57,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-10-13 00:43:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 128 proven. 412 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-13 00:43:57,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949744295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:43:57,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:43:57,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 50 [2021-10-13 00:43:57,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570567252] [2021-10-13 00:43:57,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 00:43:57,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 00:43:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2349, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:43:57,817 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:44:01,498 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2021-10-13 00:44:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 00:44:01,499 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-10-13 00:44:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:44:01,500 INFO L225 Difference]: With dead ends: 207 [2021-10-13 00:44:01,500 INFO L226 Difference]: Without dead ends: 205 [2021-10-13 00:44:01,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2512.0ms TimeCoverageRelationStatistics Valid=410, Invalid=4146, Unknown=0, NotChecked=0, Total=4556 [2021-10-13 00:44:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-13 00:44:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-10-13 00:44:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.030612244897959) internal successors, (202), 198 states have internal predecessors, (202), 3 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) [2021-10-13 00:44:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2021-10-13 00:44:01,506 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 183 [2021-10-13 00:44:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:44:01,507 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2021-10-13 00:44:01,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.8) internal successors, (290), 48 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2021-10-13 00:44:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-13 00:44:01,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:44:01,509 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:44:01,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:44:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:44:01,725 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:44:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:44:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash -307165437, now seen corresponding path program 17 times [2021-10-13 00:44:01,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:44:01,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617020885] [2021-10-13 00:44:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:44:01,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:44:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:02,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:44:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-13 00:44:02,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:44:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617020885] [2021-10-13 00:44:02,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617020885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:44:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334691464] [2021-10-13 00:44:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:44:02,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:44:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:44:02,522 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:44:02,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 00:44:04,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-13 00:44:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:44:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-13 00:44:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:44:05,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:44:07,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:44:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-13 00:44:07,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334691464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:44:07,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:44:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 56 [2021-10-13 00:44:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509013077] [2021-10-13 00:44:07,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-13 00:44:07,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:44:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-13 00:44:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 00:44:07,485 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:44:16,024 INFO L93 Difference]: Finished difference Result 580 states and 584 transitions. [2021-10-13 00:44:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-13 00:44:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-10-13 00:44:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:44:16,026 INFO L225 Difference]: With dead ends: 580 [2021-10-13 00:44:16,026 INFO L226 Difference]: Without dead ends: 217 [2021-10-13 00:44:16,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 4973.2ms TimeCoverageRelationStatistics Valid=682, Invalid=14080, Unknown=0, NotChecked=0, Total=14762 [2021-10-13 00:44:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-13 00:44:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2021-10-13 00:44:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 204 states have (on average 1.0294117647058822) internal successors, (210), 206 states have internal predecessors, (210), 3 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) [2021-10-13 00:44:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2021-10-13 00:44:16,033 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 193 [2021-10-13 00:44:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:44:16,034 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2021-10-13 00:44:16,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.410714285714286) internal successors, (303), 53 states have internal predecessors, (303), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2021-10-13 00:44:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-13 00:44:16,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:44:16,036 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:44:16,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:44:16,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-13 00:44:16,251 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-13 00:44:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:44:16,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1438038985, now seen corresponding path program 18 times [2021-10-13 00:44:16,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:44:16,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741501719] [2021-10-13 00:44:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:44:16,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:44:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:16,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:44:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:44:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 120 proven. 550 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-13 00:44:16,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:44:16,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741501719] [2021-10-13 00:44:16,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741501719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:44:16,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915373334] [2021-10-13 00:44:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:44:16,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:44:16,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:44:16,831 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:44:16,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 00:44:21,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-13 00:44:21,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:44:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 00:44:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:44:21,461 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:44:21,461 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 15 [2021-10-13 00:44:21,469 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 [2021-10-13 00:44:22,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-13 00:44:22,549 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-13 00:44:22,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-13 00:44:24,566 INFO L354 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2021-10-13 00:44:24,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 34 [2021-10-13 00:44:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-10-13 00:44:24,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915373334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:44:24,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:44:24,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-10-13 00:44:24,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102506076] [2021-10-13 00:44:24,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 00:44:24,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:44:24,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 00:44:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 00:44:24,727 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:44:28,136 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-10-13 00:44:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:44:28,137 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2021-10-13 00:44:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:44:28,137 INFO L225 Difference]: With dead ends: 210 [2021-10-13 00:44:28,137 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:44:28,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2168.9ms TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-10-13 00:44:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:44:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:44:28,138 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) [2021-10-13 00:44:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:44:28,139 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2021-10-13 00:44:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:44:28,139 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:44:28,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.735294117647059) internal successors, (195), 32 states have internal predecessors, (195), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:44:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:44:28,140 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-13 00:44:28,142 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr0REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr1REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr2REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr3REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr4REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr5REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr6REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr7REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr8REQUIRES_VIOLATION [2021-10-13 00:44:28,143 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr9REQUIRES_VIOLATION [2021-10-13 00:44:28,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:44:28,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:44:28,348 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:44:28,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:44:28 BoogieIcfgContainer [2021-10-13 00:44:28,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:44:28,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:44:28,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:44:28,351 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:44:28,352 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:41:49" (3/4) ... [2021-10-13 00:44:28,354 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:44:28,360 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-13 00:44:28,360 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-13 00:44:28,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-13 00:44:28,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-13 00:44:28,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-13 00:44:28,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-13 00:44:28,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrncmp [2021-10-13 00:44:28,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-13 00:44:28,367 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-13 00:44:28,367 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-13 00:44:28,367 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 00:44:28,368 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:44:28,412 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:44:28,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:44:28,414 INFO L168 Benchmark]: Toolchain (without parser) took 160276.03 ms. Allocated memory was 100.7 MB in the beginning and 775.9 MB in the end (delta: 675.3 MB). Free memory was 67.6 MB in the beginning and 215.1 MB in the end (delta: -147.5 MB). Peak memory consumption was 527.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:44:28,414 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory is still 56.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:44:28,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.28 ms. Allocated memory is still 100.7 MB. Free memory was 67.6 MB in the beginning and 69.3 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:44:28,415 INFO L168 Benchmark]: Boogie Preprocessor took 77.05 ms. Allocated memory is still 100.7 MB. Free memory was 69.3 MB in the beginning and 66.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:44:28,415 INFO L168 Benchmark]: RCFGBuilder took 632.19 ms. Allocated memory is still 100.7 MB. Free memory was 66.9 MB in the beginning and 46.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:44:28,416 INFO L168 Benchmark]: TraceAbstraction took 158958.43 ms. Allocated memory was 121.6 MB in the beginning and 775.9 MB in the end (delta: 654.3 MB). Free memory was 96.6 MB in the beginning and 219.0 MB in the end (delta: -122.4 MB). Peak memory consumption was 530.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:44:28,416 INFO L168 Benchmark]: Witness Printer took 62.03 ms. Allocated memory is still 775.9 MB. Free memory was 219.0 MB in the beginning and 215.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:44:28,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory is still 56.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 522.28 ms. Allocated memory is still 100.7 MB. Free memory was 67.6 MB in the beginning and 69.3 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.05 ms. Allocated memory is still 100.7 MB. Free memory was 69.3 MB in the beginning and 66.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 632.19 ms. Allocated memory is still 100.7 MB. Free memory was 66.9 MB in the beginning and 46.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 158958.43 ms. Allocated memory was 121.6 MB in the beginning and 775.9 MB in the end (delta: 654.3 MB). Free memory was 96.6 MB in the beginning and 219.0 MB in the end (delta: -122.4 MB). Peak memory consumption was 530.9 MB. Max. memory is 16.1 GB. * Witness Printer took 62.03 ms. Allocated memory is still 775.9 MB. Free memory was 219.0 MB in the beginning and 215.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 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: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 81 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 158876.5ms, OverallIterations: 46, TraceHistogramMax: 11, EmptinessCheckTime: 77.5ms, AutomataDifference: 71539.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2341 SDtfs, 9806 SDslu, 10329 SDs, 0 SdLazy, 68163 SolverSat, 1160 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 35663.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4187 GetRequests, 2551 SyntacticMatches, 29 SemanticMatches, 1607 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18659 ImplicationChecksByTransitivity, 47259.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=45, InterpolantAutomatonStates: 1051, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 191.6ms AutomataMinimizationTime, 46 MinimizatonAttempts, 231 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 440.9ms SsaConstructionTime, 6302.7ms SatisfiabilityAnalysisTime, 51198.9ms InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6032 NumberOfCodeBlocksAsserted, 152 NumberOfCheckSat, 6010 ConstructedInterpolants, 851 QuantifiedInterpolants, 69318 SizeOfPredicates, 287 NumberOfNonLiveVariables, 10475 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 74 InterpolantComputations, 19 PerfectInterpolantSequences, 4841/13756 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 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 00:44:28,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbedcd78-db8d-475d-a8c7-e3eddc05180b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...