./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 f3eebd0d696af164582cbeee8be4a910d35e299c ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:56:33,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:56:33,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:56:33,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:56:33,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:56:33,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:56:33,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:56:33,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:56:33,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:56:33,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:56:33,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:56:33,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:56:33,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:56:33,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:56:33,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:56:33,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:56:33,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:56:33,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:56:33,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:56:33,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:56:33,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:56:33,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:56:33,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:56:33,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:56:33,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:56:33,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:56:33,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:56:33,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:56:33,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:56:33,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:56:33,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:56:33,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:56:33,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:56:33,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:56:33,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:56:33,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:56:33,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:56:33,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:56:33,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:56:33,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:56:33,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:56:33,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:56:33,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:56:33,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:56:33,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:56:33,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:56:33,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:56:33,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:56:33,657 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:56:33,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:56:33,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:56:33,657 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:56:33,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:56:33,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:56:33,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:56:33,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:56:33,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:56:33,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:56:33,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:56:33,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:56:33,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:56:33,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:56:33,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:56:33,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:56:33,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:56:33,660 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3eebd0d696af164582cbeee8be4a910d35e299c [2021-08-27 04:56:33,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:56:33,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:56:33,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:56:33,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:56:33,885 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:56:33,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-08-27 04:56:33,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e699e9c53/43100c5192d54fe6aa6a70879df57999/FLAGad4b74e8c [2021-08-27 04:56:34,413 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:56:34,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-08-27 04:56:34,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e699e9c53/43100c5192d54fe6aa6a70879df57999/FLAGad4b74e8c [2021-08-27 04:56:34,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e699e9c53/43100c5192d54fe6aa6a70879df57999 [2021-08-27 04:56:34,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:56:34,916 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:56:34,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:56:34,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:56:34,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:56:34,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:56:34" (1/1) ... [2021-08-27 04:56:34,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6537b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:34, skipping insertion in model container [2021-08-27 04:56:34,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:56:34" (1/1) ... [2021-08-27 04:56:34,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:56:34,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:56:35,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:56:35,189 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:56:35,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:56:35,246 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:56:35,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35 WrapperNode [2021-08-27 04:56:35,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:56:35,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:56:35,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:56:35,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:56:35,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:56:35,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:56:35,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:56:35,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:56:35,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (1/1) ... [2021-08-27 04:56:35,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:56:35,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:35,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:56:35,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:56:35,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:56:35,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:56:35,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:56:35,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:56:35,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:56:35,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:56:35,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:56:35,431 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2021-08-27 04:56:35,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:56:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:56:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:56:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:56:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:56:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:56:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:56:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:56:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:56:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:56:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:56:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:56:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:56:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:56:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:56:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:56:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:56:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:56:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:56:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:56:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:56:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:56:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:56:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:56:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:56:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:56:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:56:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:56:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:56:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:56:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:56:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:56:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:56:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:56:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:56:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:56:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:56:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:56:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:56:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:56:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:56:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:56:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:56:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:56:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:56:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:56:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:56:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:56:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:56:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:56:35,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:56:35,946 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 04:56:35,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:56:35 BoogieIcfgContainer [2021-08-27 04:56:35,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:56:35,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:56:35,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:56:35,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:56:35,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:56:34" (1/3) ... [2021-08-27 04:56:35,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264dea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:56:35, skipping insertion in model container [2021-08-27 04:56:35,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:35" (2/3) ... [2021-08-27 04:56:35,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264dea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:56:35, skipping insertion in model container [2021-08-27 04:56:35,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:56:35" (3/3) ... [2021-08-27 04:56:35,957 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2021-08-27 04:56:35,964 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:56:35,964 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:56:35,994 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:56:35,998 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 [2021-08-27 04:56:35,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:56:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 56 states have internal predecessors, (67), 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) [2021-08-27 04:56:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:56:36,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:36,013 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:36,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-08-27 04:56:36,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:36,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056894180] [2021-08-27 04:56:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:36,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:36,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:36,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056894180] [2021-08-27 04:56:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056894180] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:36,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:36,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:36,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809051598] [2021-08-27 04:56:36,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:36,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:36,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:36,222 INFO L87 Difference]: Start difference. First operand has 63 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 56 states have internal predecessors, (67), 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) [2021-08-27 04:56:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:36,402 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-08-27 04:56:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:36,403 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 [2021-08-27 04:56:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:36,409 INFO L225 Difference]: With dead ends: 85 [2021-08-27 04:56:36,409 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:56:36,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:56:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2021-08-27 04:56:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 57 states have internal predecessors, (66), 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) [2021-08-27 04:56:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-08-27 04:56:36,435 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 11 [2021-08-27 04:56:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:36,435 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-08-27 04:56:36,436 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) [2021-08-27 04:56:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-08-27 04:56:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:56:36,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:36,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:36,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:56:36,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1095106359, now seen corresponding path program 1 times [2021-08-27 04:56:36,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:36,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600836273] [2021-08-27 04:56:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:36,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:36,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:36,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600836273] [2021-08-27 04:56:36,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600836273] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:36,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:36,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:56:36,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532078871] [2021-08-27 04:56:36,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:36,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:36,549 INFO L87 Difference]: Start difference. First operand 63 states and 71 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) [2021-08-27 04:56:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:36,688 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-08-27 04:56:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:56:36,688 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 [2021-08-27 04:56:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:36,691 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:56:36,691 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:56:36,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:56:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2021-08-27 04:56:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 59 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) [2021-08-27 04:56:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-08-27 04:56:36,704 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 11 [2021-08-27 04:56:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:36,704 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-08-27 04:56:36,704 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) [2021-08-27 04:56:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-08-27 04:56:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:56:36,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:36,705 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:36,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:56:36,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1095106360, now seen corresponding path program 1 times [2021-08-27 04:56:36,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:36,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000876369] [2021-08-27 04:56:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:36,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:36,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:36,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000876369] [2021-08-27 04:56:36,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000876369] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:36,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:36,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:56:36,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524590096] [2021-08-27 04:56:36,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:56:36,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:56:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:56:36,741 INFO L87 Difference]: Start difference. First operand 65 states and 75 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) [2021-08-27 04:56:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:36,810 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-08-27 04:56:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:56:36,811 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 [2021-08-27 04:56:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:36,811 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:56:36,811 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:56:36,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:56:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:56:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-27 04:56:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 57 states have internal predecessors, (67), 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) [2021-08-27 04:56:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-08-27 04:56:36,815 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 11 [2021-08-27 04:56:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:36,815 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-08-27 04:56:36,815 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) [2021-08-27 04:56:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-08-27 04:56:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:56:36,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:36,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:56:36,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1905282242, now seen corresponding path program 1 times [2021-08-27 04:56:36,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:36,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281193823] [2021-08-27 04:56:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:36,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:36,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:36,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281193823] [2021-08-27 04:56:36,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281193823] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:36,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:36,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:56:36,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367432220] [2021-08-27 04:56:36,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:36,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:36,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:36,878 INFO L87 Difference]: Start difference. First operand 63 states and 72 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) [2021-08-27 04:56:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:36,962 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-08-27 04:56:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:56:36,962 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 [2021-08-27 04:56:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:36,963 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:56:36,963 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:56:36,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:56:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:56:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 56 states have internal predecessors, (66), 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) [2021-08-27 04:56:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-08-27 04:56:36,966 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 13 [2021-08-27 04:56:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:36,966 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-08-27 04:56:36,966 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) [2021-08-27 04:56:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-08-27 04:56:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:56:36,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:36,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:36,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:56:36,967 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1905282190, now seen corresponding path program 1 times [2021-08-27 04:56:36,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:36,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982508212] [2021-08-27 04:56:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:36,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:36,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:37,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:37,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982508212] [2021-08-27 04:56:37,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982508212] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:37,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:37,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:37,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691564834] [2021-08-27 04:56:37,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:37,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:37,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:37,004 INFO L87 Difference]: Start difference. First operand 62 states and 71 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) [2021-08-27 04:56:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:37,080 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-08-27 04:56:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:37,080 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 [2021-08-27 04:56:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:37,081 INFO L225 Difference]: With dead ends: 83 [2021-08-27 04:56:37,081 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 04:56:37,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 04:56:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-08-27 04:56:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 67 states have internal predecessors, (80), 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) [2021-08-27 04:56:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-08-27 04:56:37,084 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 13 [2021-08-27 04:56:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:37,085 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-08-27 04:56:37,085 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) [2021-08-27 04:56:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-08-27 04:56:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:56:37,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:37,086 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:37,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:56:37,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1848023888, now seen corresponding path program 1 times [2021-08-27 04:56:37,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:37,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617636932] [2021-08-27 04:56:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:37,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:37,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:37,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617636932] [2021-08-27 04:56:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617636932] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:37,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:37,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:56:37,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530173684] [2021-08-27 04:56:37,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:56:37,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:56:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:56:37,118 INFO L87 Difference]: Start difference. First operand 73 states and 85 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) [2021-08-27 04:56:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:37,181 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-08-27 04:56:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:56:37,182 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 [2021-08-27 04:56:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:37,182 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:56:37,183 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 04:56:37,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:56:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 04:56:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 04:56:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.5) internal successors, (78), 65 states have internal predecessors, (78), 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) [2021-08-27 04:56:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-08-27 04:56:37,186 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 13 [2021-08-27 04:56:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-08-27 04:56:37,186 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) [2021-08-27 04:56:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-08-27 04:56:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:56:37,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:37,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:37,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:56:37,187 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:37,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1848023887, now seen corresponding path program 1 times [2021-08-27 04:56:37,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:37,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143225951] [2021-08-27 04:56:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:37,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:37,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:37,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143225951] [2021-08-27 04:56:37,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143225951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:37,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:37,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:37,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130135507] [2021-08-27 04:56:37,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:56:37,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:56:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:37,241 INFO L87 Difference]: Start difference. First operand 71 states and 83 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) [2021-08-27 04:56:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:37,341 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-08-27 04:56:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:37,341 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 [2021-08-27 04:56:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:37,342 INFO L225 Difference]: With dead ends: 83 [2021-08-27 04:56:37,342 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 04:56:37,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 04:56:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-08-27 04:56:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 67 states have internal predecessors, (81), 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) [2021-08-27 04:56:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-08-27 04:56:37,352 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 13 [2021-08-27 04:56:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:37,353 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-08-27 04:56:37,353 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) [2021-08-27 04:56:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-08-27 04:56:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:56:37,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:37,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:56:37,354 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1065792642, now seen corresponding path program 1 times [2021-08-27 04:56:37,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:37,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749406160] [2021-08-27 04:56:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:37,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:37,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:37,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749406160] [2021-08-27 04:56:37,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749406160] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:37,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:37,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:56:37,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361250199] [2021-08-27 04:56:37,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:37,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:37,396 INFO L87 Difference]: Start difference. First operand 73 states and 86 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) [2021-08-27 04:56:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:37,476 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-08-27 04:56:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:56:37,476 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 [2021-08-27 04:56:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:37,477 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:56:37,477 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:56:37,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:56:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-27 04:56:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 66 states have internal predecessors, (80), 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) [2021-08-27 04:56:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-27 04:56:37,480 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 14 [2021-08-27 04:56:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:37,480 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-27 04:56:37,481 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) [2021-08-27 04:56:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-27 04:56:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:56:37,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:37,481 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:37,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:56:37,482 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-08-27 04:56:37,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:37,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840458431] [2021-08-27 04:56:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:37,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:37,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:37,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840458431] [2021-08-27 04:56:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840458431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:37,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834988035] [2021-08-27 04:56:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:37,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:37,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:37,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:37,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:56:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:56:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:37,727 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:56:37,727 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 [2021-08-27 04:56:37,731 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 [2021-08-27 04:56:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834988035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:37,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:37,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:56:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49899390] [2021-08-27 04:56:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:56:37,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:56:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:37,809 INFO L87 Difference]: Start difference. First operand 72 states and 85 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) [2021-08-27 04:56:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:37,973 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-08-27 04:56:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:37,973 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 [2021-08-27 04:56:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:37,974 INFO L225 Difference]: With dead ends: 92 [2021-08-27 04:56:37,974 INFO L226 Difference]: Without dead ends: 92 [2021-08-27 04:56:37,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-27 04:56:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-08-27 04:56:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.44) internal successors, (72), 61 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) [2021-08-27 04:56:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-08-27 04:56:37,977 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 15 [2021-08-27 04:56:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:37,977 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-08-27 04:56:37,977 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) [2021-08-27 04:56:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-08-27 04:56:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:56:37,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:37,978 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:37,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:38,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:38,196 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2008977164, now seen corresponding path program 1 times [2021-08-27 04:56:38,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:38,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236636960] [2021-08-27 04:56:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:38,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:38,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:38,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236636960] [2021-08-27 04:56:38,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236636960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:38,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412382042] [2021-08-27 04:56:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:38,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:38,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:38,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:56:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:56:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:38,401 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:56:38,402 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 [2021-08-27 04:56:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:38,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412382042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:38,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:38,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:56:38,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429012004] [2021-08-27 04:56:38,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:56:38,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:56:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:38,497 INFO L87 Difference]: Start difference. First operand 67 states and 77 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) [2021-08-27 04:56:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:38,618 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-08-27 04:56:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:56:38,618 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 [2021-08-27 04:56:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:38,619 INFO L225 Difference]: With dead ends: 75 [2021-08-27 04:56:38,619 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 04:56:38,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:56:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 04:56:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-08-27 04:56:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 58 states have internal predecessors, (68), 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) [2021-08-27 04:56:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-08-27 04:56:38,621 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 17 [2021-08-27 04:56:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:38,621 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-08-27 04:56:38,622 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) [2021-08-27 04:56:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-08-27 04:56:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:56:38,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:38,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:38,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:38,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-27 04:56:38,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrncmpErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1968803502, now seen corresponding path program 1 times [2021-08-27 04:56:38,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:38,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415078283] [2021-08-27 04:56:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:38,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:38,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:38,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415078283] [2021-08-27 04:56:38,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415078283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:38,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:38,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:38,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519863327] [2021-08-27 04:56:38,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:56:38,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:56:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:38,878 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-08-27 04:56:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:38,971 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-08-27 04:56:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:38,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2021-08-27 04:56:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:38,972 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:56:38,972 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:56:38,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:56:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:56:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.375) internal successors, (66), 56 states have internal predecessors, (66), 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) [2021-08-27 04:56:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-08-27 04:56:38,974 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 19 [2021-08-27 04:56:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-08-27 04:56:38,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-08-27 04:56:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-08-27 04:56:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:56:38,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:38,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:56:38,975 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1968803501, now seen corresponding path program 1 times [2021-08-27 04:56:38,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:38,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326422860] [2021-08-27 04:56:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:38,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:39,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:39,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326422860] [2021-08-27 04:56:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326422860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:39,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:39,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:56:39,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318242700] [2021-08-27 04:56:39,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:56:39,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:56:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:39,039 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-08-27 04:56:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:39,176 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-08-27 04:56:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:56:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 19 [2021-08-27 04:56:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:39,178 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:56:39,178 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 04:56:39,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:56:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 04:56:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-08-27 04:56:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 61 states have internal predecessors, (74), 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) [2021-08-27 04:56:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-08-27 04:56:39,180 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 19 [2021-08-27 04:56:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:39,181 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-08-27 04:56:39,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-08-27 04:56:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-08-27 04:56:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:56:39,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:39,182 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] [2021-08-27 04:56:39,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 04:56:39,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrncmpErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2060413811, now seen corresponding path program 1 times [2021-08-27 04:56:39,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:39,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187673853] [2021-08-27 04:56:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:39,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:39,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:39,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187673853] [2021-08-27 04:56:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187673853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:39,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:39,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:56:39,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218415152] [2021-08-27 04:56:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:56:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:56:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:39,222 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-08-27 04:56:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:39,342 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-08-27 04:56:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:56:39,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-08-27 04:56:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:39,343 INFO L225 Difference]: With dead ends: 66 [2021-08-27 04:56:39,343 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 04:56:39,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:56:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 04:56:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-27 04:56:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.3584905660377358) 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) [2021-08-27 04:56:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-08-27 04:56:39,345 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 21 [2021-08-27 04:56:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:39,346 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-08-27 04:56:39,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-08-27 04:56:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-08-27 04:56:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:56:39,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:39,347 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] [2021-08-27 04:56:39,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:56:39,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2060413812, now seen corresponding path program 1 times [2021-08-27 04:56:39,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:39,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506552207] [2021-08-27 04:56:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:39,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:39,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:39,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506552207] [2021-08-27 04:56:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506552207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:39,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:39,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:56:39,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834494652] [2021-08-27 04:56:39,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:56:39,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:56:39,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:56:39,428 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-08-27 04:56:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:39,583 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-08-27 04:56:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:56:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 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 [2021-08-27 04:56:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:39,584 INFO L225 Difference]: With dead ends: 68 [2021-08-27 04:56:39,585 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:56:39,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:56:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:56:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-08-27 04:56:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.3396226415094339) 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) [2021-08-27 04:56:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-08-27 04:56:39,587 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 21 [2021-08-27 04:56:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:39,587 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-08-27 04:56:39,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-08-27 04:56:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-08-27 04:56:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:56:39,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:39,588 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] [2021-08-27 04:56:39,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:56:39,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash -551434875, now seen corresponding path program 1 times [2021-08-27 04:56:39,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:39,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938679153] [2021-08-27 04:56:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:39,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:56:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:39,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:39,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938679153] [2021-08-27 04:56:39,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938679153] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:39,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:39,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:56:39,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250335820] [2021-08-27 04:56:39,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:39,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:39,642 INFO L87 Difference]: Start difference. First operand 66 states and 76 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) [2021-08-27 04:56:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:39,690 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-08-27 04:56:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:56:39,691 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 [2021-08-27 04:56:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:39,691 INFO L225 Difference]: With dead ends: 65 [2021-08-27 04:56:39,691 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:56:39,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:56:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 04:56:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 54 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) [2021-08-27 04:56:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-08-27 04:56:39,693 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 22 [2021-08-27 04:56:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:39,693 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-08-27 04:56:39,693 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) [2021-08-27 04:56:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-08-27 04:56:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:56:39,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:39,694 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, 1] [2021-08-27 04:56:39,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:56:39,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrncmpErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash 77751092, now seen corresponding path program 1 times [2021-08-27 04:56:39,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:39,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353468536] [2021-08-27 04:56:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:39,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:39,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:39,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353468536] [2021-08-27 04:56:39,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353468536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:39,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:39,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:56:39,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469029250] [2021-08-27 04:56:39,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:56:39,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:56:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:39,734 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-08-27 04:56:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:39,817 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-08-27 04:56:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:56:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 23 [2021-08-27 04:56:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:39,818 INFO L225 Difference]: With dead ends: 58 [2021-08-27 04:56:39,818 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 04:56:39,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:56:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 04:56:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-27 04:56:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 53 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) [2021-08-27 04:56:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-08-27 04:56:39,820 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 23 [2021-08-27 04:56:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:39,821 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-08-27 04:56:39,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-08-27 04:56:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-08-27 04:56:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:56:39,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:39,821 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, 1] [2021-08-27 04:56:39,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:56:39,822 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrncmpErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 77751093, now seen corresponding path program 1 times [2021-08-27 04:56:39,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:39,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476170095] [2021-08-27 04:56:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:39,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:39,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:39,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476170095] [2021-08-27 04:56:39,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476170095] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:39,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:39,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:56:39,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307437042] [2021-08-27 04:56:39,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:56:39,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:56:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:39,875 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-08-27 04:56:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:39,986 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-08-27 04:56:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:56:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 23 [2021-08-27 04:56:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:39,987 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:56:39,987 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:56:39,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:56:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:56:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-08-27 04:56:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 54 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) [2021-08-27 04:56:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-08-27 04:56:39,989 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 23 [2021-08-27 04:56:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:39,989 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-08-27 04:56:39,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-08-27 04:56:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-08-27 04:56:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 04:56:39,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:39,990 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, 1, 1, 1] [2021-08-27 04:56:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:56:39,990 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrncmpErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1704080630, now seen corresponding path program 1 times [2021-08-27 04:56:39,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:39,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336104861] [2021-08-27 04:56:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:39,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:40,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:40,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336104861] [2021-08-27 04:56:40,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336104861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:40,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:40,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:56:40,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768868441] [2021-08-27 04:56:40,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:56:40,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:40,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:56:40,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:56:40,089 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-08-27 04:56:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:40,307 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-08-27 04:56:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:56:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 25 [2021-08-27 04:56:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:40,308 INFO L225 Difference]: With dead ends: 68 [2021-08-27 04:56:40,309 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:56:40,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:56:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:56:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-08-27 04:56:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 56 states have internal predecessors, (64), 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) [2021-08-27 04:56:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-08-27 04:56:40,310 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 25 [2021-08-27 04:56:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:40,311 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-08-27 04:56:40,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-08-27 04:56:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-08-27 04:56:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 04:56:40,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:40,312 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, 1, 1, 1] [2021-08-27 04:56:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:56:40,312 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrncmpErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1704080629, now seen corresponding path program 1 times [2021-08-27 04:56:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:40,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664950474] [2021-08-27 04:56:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:40,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:40,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:40,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664950474] [2021-08-27 04:56:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664950474] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:40,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:40,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:56:40,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4648829] [2021-08-27 04:56:40,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:56:40,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:56:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:40,360 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-08-27 04:56:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:40,443 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-08-27 04:56:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:56:40,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 25 [2021-08-27 04:56:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:40,444 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:56:40,444 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 04:56:40,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:56:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 04:56:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-27 04:56:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 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) [2021-08-27 04:56:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-08-27 04:56:40,446 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2021-08-27 04:56:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:40,446 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-08-27 04:56:40,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-08-27 04:56:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-08-27 04:56:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:56:40,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:40,447 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, 1, 1, 1, 1, 1] [2021-08-27 04:56:40,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:56:40,447 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1505322102, now seen corresponding path program 1 times [2021-08-27 04:56:40,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:40,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732403343] [2021-08-27 04:56:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:40,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:40,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:40,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732403343] [2021-08-27 04:56:40,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732403343] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:40,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:40,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:56:40,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812276035] [2021-08-27 04:56:40,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:56:40,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:56:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:56:40,572 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-08-27 04:56:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:40,784 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-08-27 04:56:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:56:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 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 27 [2021-08-27 04:56:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:40,785 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:56:40,786 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 04:56:40,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:56:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 04:56:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-27 04:56:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 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) [2021-08-27 04:56:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-08-27 04:56:40,787 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 27 [2021-08-27 04:56:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:40,788 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-08-27 04:56:40,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-08-27 04:56:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-08-27 04:56:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:56:40,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:40,789 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, 1, 1, 1, 1, 1] [2021-08-27 04:56:40,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 04:56:40,789 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1928023928, now seen corresponding path program 1 times [2021-08-27 04:56:40,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:40,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157253089] [2021-08-27 04:56:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:40,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:40,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:40,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157253089] [2021-08-27 04:56:40,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157253089] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:40,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:40,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:56:40,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95824382] [2021-08-27 04:56:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:56:40,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:56:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:56:40,988 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-08-27 04:56:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:41,202 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-08-27 04:56:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:56:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 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 27 [2021-08-27 04:56:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:41,203 INFO L225 Difference]: With dead ends: 79 [2021-08-27 04:56:41,203 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:56:41,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:56:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:56:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-08-27 04:56:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-08-27 04:56:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-08-27 04:56:41,204 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 27 [2021-08-27 04:56:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:41,205 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-08-27 04:56:41,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-08-27 04:56:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-08-27 04:56:41,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:56:41,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:41,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:41,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 04:56:41,206 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1331508539, now seen corresponding path program 1 times [2021-08-27 04:56:41,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:41,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312593028] [2021-08-27 04:56:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:41,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:41,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:41,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:41,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312593028] [2021-08-27 04:56:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312593028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:41,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018954507] [2021-08-27 04:56:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:41,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:41,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:41,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:41,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:56:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:56:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:41,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018954507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:41,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:41,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-27 04:56:41,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502520957] [2021-08-27 04:56:41,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 04:56:41,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 04:56:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:56:41,676 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 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) [2021-08-27 04:56:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:41,969 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-08-27 04:56:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:56:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 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 31 [2021-08-27 04:56:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:41,970 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:56:41,970 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:56:41,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:56:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:56:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-08-27 04:56:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 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) [2021-08-27 04:56:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-08-27 04:56:41,972 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 31 [2021-08-27 04:56:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:41,972 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-08-27 04:56:41,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 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) [2021-08-27 04:56:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-08-27 04:56:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:56:41,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:41,973 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] [2021-08-27 04:56:41,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:42,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:42,189 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -320547492, now seen corresponding path program 1 times [2021-08-27 04:56:42,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:42,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070538370] [2021-08-27 04:56:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:42,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:42,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:42,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:42,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070538370] [2021-08-27 04:56:42,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070538370] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:42,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:42,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 04:56:42,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144630463] [2021-08-27 04:56:42,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:56:42,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:42,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:56:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:56:42,346 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-08-27 04:56:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:42,615 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-08-27 04:56:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:56:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 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 33 [2021-08-27 04:56:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:42,616 INFO L225 Difference]: With dead ends: 74 [2021-08-27 04:56:42,616 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 04:56:42,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:56:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 04:56:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-27 04:56:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-08-27 04:56:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-08-27 04:56:42,618 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 33 [2021-08-27 04:56:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:42,618 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-08-27 04:56:42,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-08-27 04:56:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-08-27 04:56:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:56:42,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:42,618 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] [2021-08-27 04:56:42,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-27 04:56:42,619 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash -258507878, now seen corresponding path program 1 times [2021-08-27 04:56:42,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:42,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303583151] [2021-08-27 04:56:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:42,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:42,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303583151] [2021-08-27 04:56:42,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303583151] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:42,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:42,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 04:56:42,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880781462] [2021-08-27 04:56:42,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 04:56:42,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 04:56:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:56:42,823 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 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) [2021-08-27 04:56:43,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:43,139 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-08-27 04:56:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:56:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 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 33 [2021-08-27 04:56:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:43,140 INFO L225 Difference]: With dead ends: 70 [2021-08-27 04:56:43,140 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 04:56:43,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:56:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 04:56:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-08-27 04:56:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 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) [2021-08-27 04:56:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-08-27 04:56:43,142 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 33 [2021-08-27 04:56:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:43,142 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-08-27 04:56:43,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 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) [2021-08-27 04:56:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-08-27 04:56:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:56:43,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:43,143 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, 1, 1] [2021-08-27 04:56:43,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-27 04:56:43,143 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash -912468131, now seen corresponding path program 1 times [2021-08-27 04:56:43,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:43,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276095848] [2021-08-27 04:56:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:43,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:43,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:43,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:43,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276095848] [2021-08-27 04:56:43,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276095848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:43,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700156609] [2021-08-27 04:56:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:43,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:43,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:43,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:43,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:56:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:43,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:56:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:43,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700156609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:43,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:43,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-27 04:56:43,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241418352] [2021-08-27 04:56:43,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:56:43,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:43,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:56:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:56:43,623 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 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) [2021-08-27 04:56:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:43,878 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-08-27 04:56:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:56:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 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 37 [2021-08-27 04:56:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:43,879 INFO L225 Difference]: With dead ends: 58 [2021-08-27 04:56:43,879 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 04:56:43,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:56:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 04:56:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-08-27 04:56:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 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) [2021-08-27 04:56:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-08-27 04:56:43,881 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2021-08-27 04:56:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:43,881 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-08-27 04:56:43,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 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) [2021-08-27 04:56:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-08-27 04:56:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 04:56:43,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:43,882 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:43,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:44,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:44,100 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrncmpErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -708544290, now seen corresponding path program 1 times [2021-08-27 04:56:44,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:44,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947502391] [2021-08-27 04:56:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:44,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:44,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:44,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947502391] [2021-08-27 04:56:44,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947502391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:44,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436037209] [2021-08-27 04:56:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:44,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:44,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:44,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:44,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:56:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:56:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:44,499 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:56:44,499 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 [2021-08-27 04:56:44,502 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 [2021-08-27 04:56:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:44,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436037209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:44,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:44,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-08-27 04:56:44,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223449585] [2021-08-27 04:56:44,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:56:44,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:56:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:56:44,790 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 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) [2021-08-27 04:56:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:45,098 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-08-27 04:56:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:56:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 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 39 [2021-08-27 04:56:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:45,099 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:56:45,099 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:56:45,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:56:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:56:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-08-27 04:56:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 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) [2021-08-27 04:56:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-08-27 04:56:45,101 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 39 [2021-08-27 04:56:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:45,101 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-08-27 04:56:45,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 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) [2021-08-27 04:56:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-08-27 04:56:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 04:56:45,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:45,102 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, 1] [2021-08-27 04:56:45,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:45,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 04:56:45,322 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrncmpErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1988461663, now seen corresponding path program 1 times [2021-08-27 04:56:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:45,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376258227] [2021-08-27 04:56:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:45,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:45,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:45,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:45,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376258227] [2021-08-27 04:56:45,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376258227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:45,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504319307] [2021-08-27 04:56:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:45,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:45,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:45,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:45,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:56:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-27 04:56:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:45,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504319307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:45,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:45,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-27 04:56:45,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314981554] [2021-08-27 04:56:45,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:56:45,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:56:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:56:45,964 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 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) [2021-08-27 04:56:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:46,333 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-08-27 04:56:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:56:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 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 41 [2021-08-27 04:56:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:46,334 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:56:46,334 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:56:46,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:56:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:56:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-08-27 04:56:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 50 states have internal predecessors, (53), 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) [2021-08-27 04:56:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-08-27 04:56:46,336 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 41 [2021-08-27 04:56:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:46,336 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-08-27 04:56:46,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 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) [2021-08-27 04:56:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-08-27 04:56:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 04:56:46,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:46,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:46,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:46,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:56:46,555 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash -82412129, now seen corresponding path program 1 times [2021-08-27 04:56:46,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:46,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225403144] [2021-08-27 04:56:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:46,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:46,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:46,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225403144] [2021-08-27 04:56:46,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225403144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:46,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122471142] [2021-08-27 04:56:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:46,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:46,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:46,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:56:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-27 04:56:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:47,217 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 [2021-08-27 04:56:47,735 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 21 treesize of output 13 [2021-08-27 04:56:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:56:47,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122471142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:47,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:47,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-08-27 04:56:47,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964984223] [2021-08-27 04:56:47,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:56:47,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:56:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:56:47,746 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 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) [2021-08-27 04:56:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:49,122 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2021-08-27 04:56:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-27 04:56:49,123 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 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 43 [2021-08-27 04:56:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:49,123 INFO L225 Difference]: With dead ends: 142 [2021-08-27 04:56:49,123 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 04:56:49,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1257.5ms TimeCoverageRelationStatistics Valid=365, Invalid=3295, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 04:56:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 04:56:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-08-27 04:56:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 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) [2021-08-27 04:56:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-08-27 04:56:49,125 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 43 [2021-08-27 04:56:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:49,125 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-08-27 04:56:49,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 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) [2021-08-27 04:56:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-08-27 04:56:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:56:49,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:49,126 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:56:49,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:49,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:49,327 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1162320101, now seen corresponding path program 2 times [2021-08-27 04:56:49,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:49,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045436485] [2021-08-27 04:56:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:49,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:49,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:49,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:49,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045436485] [2021-08-27 04:56:49,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045436485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:49,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290307672] [2021-08-27 04:56:49,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:49,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:49,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:49,556 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:49,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:56:49,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:56:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 04:56:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:50,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290307672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:50,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:50,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-27 04:56:50,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409723323] [2021-08-27 04:56:50,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:56:50,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:50,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:56:50,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:56:50,212 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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) [2021-08-27 04:56:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:50,652 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-08-27 04:56:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:56:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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 51 [2021-08-27 04:56:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:50,653 INFO L225 Difference]: With dead ends: 75 [2021-08-27 04:56:50,653 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 04:56:50,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:56:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 04:56:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-08-27 04:56:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 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) [2021-08-27 04:56:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-08-27 04:56:50,655 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 51 [2021-08-27 04:56:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:50,655 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-08-27 04:56:50,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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) [2021-08-27 04:56:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-08-27 04:56:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 04:56:50,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:50,656 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-27 04:56:50,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:50,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 04:56:50,874 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash 298120838, now seen corresponding path program 2 times [2021-08-27 04:56:50,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:50,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426472151] [2021-08-27 04:56:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:50,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:51,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:51,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:51,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426472151] [2021-08-27 04:56:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426472151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:51,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366971752] [2021-08-27 04:56:51,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:51,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:51,075 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:51,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:56:51,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:56:51,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 04:56:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:51,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366971752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:51,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:51,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-27 04:56:51,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314110009] [2021-08-27 04:56:51,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 04:56:51,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 04:56:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:56:51,603 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 18 states have internal predecessors, (70), 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) [2021-08-27 04:56:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:51,973 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-08-27 04:56:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:56:51,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 18 states have internal predecessors, (70), 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 53 [2021-08-27 04:56:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:51,974 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:56:51,974 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 04:56:51,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:56:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 04:56:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 04:56:51,976 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) [2021-08-27 04:56:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-08-27 04:56:51,976 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 53 [2021-08-27 04:56:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:51,976 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-08-27 04:56:51,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 18 states have internal predecessors, (70), 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) [2021-08-27 04:56:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-08-27 04:56:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:56:51,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:51,977 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:51,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:52,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:52,195 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrncmpErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1268682297, now seen corresponding path program 2 times [2021-08-27 04:56:52,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:52,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091187582] [2021-08-27 04:56:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:52,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:52,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:52,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:52,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091187582] [2021-08-27 04:56:52,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091187582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:52,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768450380] [2021-08-27 04:56:52,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:52,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:52,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:52,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:52,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:56:52,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 04:56:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 04:56:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 04:56:52,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768450380] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:52,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:56:52,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2021-08-27 04:56:52,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994711125] [2021-08-27 04:56:52,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:56:52,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:52,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:56:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:56:52,774 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:52,792 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-08-27 04:56:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:56:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 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 55 [2021-08-27 04:56:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:52,793 INFO L225 Difference]: With dead ends: 69 [2021-08-27 04:56:52,793 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 04:56:52,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:56:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 04:56:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-08-27 04:56:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 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) [2021-08-27 04:56:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-08-27 04:56:52,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 55 [2021-08-27 04:56:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-08-27 04:56:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-08-27 04:56:52,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 04:56:52,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:52,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2021-08-27 04:56:52,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:53,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-27 04:56:53,013 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrncmpErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash 566748936, now seen corresponding path program 2 times [2021-08-27 04:56:53,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:53,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335839881] [2021-08-27 04:56:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:53,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:53,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:53,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:53,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335839881] [2021-08-27 04:56:53,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335839881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:53,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115566949] [2021-08-27 04:56:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:53,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:53,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:53,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:56:53,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 04:56:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:56:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-27 04:56:53,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115566949] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:53,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:56:53,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2021-08-27 04:56:53,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461643573] [2021-08-27 04:56:53,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:53,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:53,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:56:53,673 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:53,709 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-08-27 04:56:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 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 57 [2021-08-27 04:56:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:53,710 INFO L225 Difference]: With dead ends: 66 [2021-08-27 04:56:53,710 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:56:53,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:56:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:56:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-27 04:56:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 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) [2021-08-27 04:56:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-08-27 04:56:53,712 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2021-08-27 04:56:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:53,712 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-08-27 04:56:53,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-08-27 04:56:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-27 04:56:53,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:53,713 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:53,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-27 04:56:53,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-27 04:56:53,930 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash -548742648, now seen corresponding path program 3 times [2021-08-27 04:56:53,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:53,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025112835] [2021-08-27 04:56:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:53,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:54,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:54,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025112835] [2021-08-27 04:56:54,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025112835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:54,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325925446] [2021-08-27 04:56:54,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:56:54,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:54,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:54,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:54,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:56:54,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:56:54,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-27 04:56:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:54,613 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:56:54,614 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 [2021-08-27 04:56:54,910 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 [2021-08-27 04:56:55,548 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 40 treesize of output 34 [2021-08-27 04:56:55,741 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-27 04:56:55,742 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 45 treesize of output 29 [2021-08-27 04:56:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:56:55,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325925446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:55,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:55,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2021-08-27 04:56:55,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320047660] [2021-08-27 04:56:55,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:56:55,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:56:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:56:55,754 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-08-27 04:56:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:57,569 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2021-08-27 04:56:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-27 04:56:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 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 59 [2021-08-27 04:56:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:57,570 INFO L225 Difference]: With dead ends: 178 [2021-08-27 04:56:57,570 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 04:56:57,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1761.1ms TimeCoverageRelationStatistics Valid=464, Invalid=4792, Unknown=0, NotChecked=0, Total=5256 [2021-08-27 04:56:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 04:56:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-08-27 04:56:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 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) [2021-08-27 04:56:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-08-27 04:56:57,573 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2021-08-27 04:56:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:57,573 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-08-27 04:56:57,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-08-27 04:56:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-08-27 04:56:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-27 04:56:57,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:57,573 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:56:57,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:57,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-27 04:56:57,774 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:56:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1002719566, now seen corresponding path program 4 times [2021-08-27 04:56:57,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:57,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979958401] [2021-08-27 04:56:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:57,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:56:57,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:57,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979958401] [2021-08-27 04:56:57,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979958401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:57,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346319702] [2021-08-27 04:56:57,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:56:57,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:57,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:57,976 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:57,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:56:58,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:56:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 04:56:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:58,445 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:56:58,445 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 [2021-08-27 04:56:58,452 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 [2021-08-27 04:56:58,913 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 [2021-08-27 04:56:58,958 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:56:58,958 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 [2021-08-27 04:56:59,727 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-08-27 04:56:59,728 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 37 treesize of output 24 [2021-08-27 04:56:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:56:59,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346319702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:59,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:59,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-08-27 04:56:59,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426702352] [2021-08-27 04:56:59,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:56:59,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:56:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:56:59,856 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 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) [2021-08-27 04:57:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:01,380 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-08-27 04:57:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:57:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 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 [2021-08-27 04:57:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:01,381 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:57:01,381 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:57:01,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1176.2ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:57:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:57:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-08-27 04:57:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 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) [2021-08-27 04:57:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-08-27 04:57:01,383 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 67 [2021-08-27 04:57:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:01,383 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-08-27 04:57:01,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 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) [2021-08-27 04:57:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-08-27 04:57:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-27 04:57:01,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:01,385 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-27 04:57:01,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:01,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-27 04:57:01,585 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrncmpErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:57:01,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:01,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1540829359, now seen corresponding path program 3 times [2021-08-27 04:57:01,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:01,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685032840] [2021-08-27 04:57:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:01,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:57:01,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:01,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685032840] [2021-08-27 04:57:01,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685032840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:01,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587377831] [2021-08-27 04:57:01,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:57:01,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:01,775 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:01,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:57:02,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:57:02,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 04:57:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:02,359 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:57:02,359 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 [2021-08-27 04:57:02,505 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 [2021-08-27 04:57:02,759 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-08-27 04:57:02,759 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 32 treesize of output 36 [2021-08-27 04:57:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-27 04:57:02,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587377831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:02,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:02,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-27 04:57:02,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463274504] [2021-08-27 04:57:02,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 04:57:02,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 04:57:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:57:02,890 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 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) [2021-08-27 04:57:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:04,228 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-08-27 04:57:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 04:57:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 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 69 [2021-08-27 04:57:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:04,229 INFO L225 Difference]: With dead ends: 79 [2021-08-27 04:57:04,229 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 04:57:04,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1296.0ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 04:57:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 04:57:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-08-27 04:57:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 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) [2021-08-27 04:57:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-08-27 04:57:04,232 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2021-08-27 04:57:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:04,232 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-08-27 04:57:04,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 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) [2021-08-27 04:57:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-08-27 04:57:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-27 04:57:04,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:04,232 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:57:04,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:04,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:04,445 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:57:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1982402929, now seen corresponding path program 5 times [2021-08-27 04:57:04,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:04,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145079940] [2021-08-27 04:57:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:04,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:57:04,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:04,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145079940] [2021-08-27 04:57:04,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145079940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:04,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357600772] [2021-08-27 04:57:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:57:04,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:04,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:04,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:04,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:57:05,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:57:05,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 04:57:05,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:05,423 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 [2021-08-27 04:57:05,755 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 21 treesize of output 17 [2021-08-27 04:57:05,800 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:57:05,801 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 35 treesize of output 34 [2021-08-27 04:57:06,658 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:57:06,659 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 38 treesize of output 23 [2021-08-27 04:57:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:57:06,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357600772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:06,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:06,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-27 04:57:06,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591107981] [2021-08-27 04:57:06,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:57:06,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:57:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:57:06,671 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 28 states have internal predecessors, (118), 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) [2021-08-27 04:57:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:27,940 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2021-08-27 04:57:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:57:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 28 states have internal predecessors, (118), 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 [2021-08-27 04:57:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:27,941 INFO L225 Difference]: With dead ends: 133 [2021-08-27 04:57:27,941 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 04:57:27,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 21010.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:57:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 04:57:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-08-27 04:57:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 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) [2021-08-27 04:57:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-08-27 04:57:27,943 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2021-08-27 04:57:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:27,943 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-08-27 04:57:27,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 28 states have internal predecessors, (118), 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) [2021-08-27 04:57:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-08-27 04:57:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-27 04:57:27,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:27,944 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:27,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:28,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:28,145 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:57:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash -723077580, now seen corresponding path program 6 times [2021-08-27 04:57:28,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:28,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520039073] [2021-08-27 04:57:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:28,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:28,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:57:28,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:28,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520039073] [2021-08-27 04:57:28,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520039073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:28,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481006755] [2021-08-27 04:57:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:57:28,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:28,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:28,380 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:28,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:57:29,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:57:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:29,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 04:57:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:57:29,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481006755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:29,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:29,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-08-27 04:57:29,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818377839] [2021-08-27 04:57:29,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:57:29,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:57:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:57:29,571 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 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) [2021-08-27 04:57:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:30,189 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-08-27 04:57:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:57:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 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 79 [2021-08-27 04:57:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:30,190 INFO L225 Difference]: With dead ends: 91 [2021-08-27 04:57:30,190 INFO L226 Difference]: Without dead ends: 91 [2021-08-27 04:57:30,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:57:30,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-27 04:57:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-08-27 04:57:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 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) [2021-08-27 04:57:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-08-27 04:57:30,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2021-08-27 04:57:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:30,193 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-08-27 04:57:30,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 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) [2021-08-27 04:57:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-08-27 04:57:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-27 04:57:30,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:30,194 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:30,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:30,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-27 04:57:30,409 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:57:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -509921193, now seen corresponding path program 7 times [2021-08-27 04:57:30,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:30,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896212801] [2021-08-27 04:57:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:30,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 70 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:57:30,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:30,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896212801] [2021-08-27 04:57:30,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896212801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:30,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264725191] [2021-08-27 04:57:30,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:57:30,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:30,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:30,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:30,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:57:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:57:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:31,328 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:57:31,328 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 [2021-08-27 04:57:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 78 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:57:31,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264725191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:31,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:31,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-08-27 04:57:31,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55178748] [2021-08-27 04:57:31,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:57:31,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:57:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:57:31,773 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 32 states, 32 states have (on average 4.125) internal successors, (132), 29 states have internal predecessors, (132), 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) [2021-08-27 04:57:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:32,195 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-08-27 04:57:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:57:32,196 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 29 states have internal predecessors, (132), 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 87 [2021-08-27 04:57:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:32,196 INFO L225 Difference]: With dead ends: 136 [2021-08-27 04:57:32,196 INFO L226 Difference]: Without dead ends: 95 [2021-08-27 04:57:32,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:57:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-27 04:57:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-08-27 04:57:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 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) [2021-08-27 04:57:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-08-27 04:57:32,199 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2021-08-27 04:57:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:32,199 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-08-27 04:57:32,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 29 states have internal predecessors, (132), 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) [2021-08-27 04:57:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-08-27 04:57:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-27 04:57:32,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:32,200 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:57:32,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:32,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-27 04:57:32,414 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:57:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash -233954342, now seen corresponding path program 8 times [2021-08-27 04:57:32,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:32,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486844655] [2021-08-27 04:57:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:32,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:57:32,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:32,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486844655] [2021-08-27 04:57:32,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486844655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:32,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703337490] [2021-08-27 04:57:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:57:32,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:32,730 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:57:33,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:57:33,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-27 04:57:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:33,474 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 [2021-08-27 04:57:33,868 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 21 treesize of output 17 [2021-08-27 04:57:33,917 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:57:33,918 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 35 treesize of output 34 [2021-08-27 04:57:35,018 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:57:35,019 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 38 treesize of output 23 [2021-08-27 04:57:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:57:35,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703337490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:35,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:35,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-08-27 04:57:35,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174232710] [2021-08-27 04:57:35,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:57:35,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:57:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:57:35,030 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 33 states have internal predecessors, (142), 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) [2021-08-27 04:58:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:04,570 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-08-27 04:58:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:58:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 33 states have internal predecessors, (142), 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 91 [2021-08-27 04:58:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:04,571 INFO L225 Difference]: With dead ends: 161 [2021-08-27 04:58:04,571 INFO L226 Difference]: Without dead ends: 99 [2021-08-27 04:58:04,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 29344.9ms TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 04:58:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-27 04:58:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-08-27 04:58:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 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) [2021-08-27 04:58:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-08-27 04:58:04,573 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2021-08-27 04:58:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:04,573 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-08-27 04:58:04,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 33 states have internal predecessors, (142), 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) [2021-08-27 04:58:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-08-27 04:58:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-27 04:58:04,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:04,574 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:04,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:04,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:58:04,775 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:58:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2053628573, now seen corresponding path program 9 times [2021-08-27 04:58:04,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:04,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793711516] [2021-08-27 04:58:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:04,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:05,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:58:05,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:05,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793711516] [2021-08-27 04:58:05,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793711516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:05,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543965563] [2021-08-27 04:58:05,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:58:05,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:05,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:05,061 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:05,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:58:06,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:58:06,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 04:58:06,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:06,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:58:06,080 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 [2021-08-27 04:58:06,502 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 [2021-08-27 04:58:07,135 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 [2021-08-27 04:58:07,289 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-27 04:58:07,289 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 [2021-08-27 04:58:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:58:07,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543965563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:07,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:07,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2021-08-27 04:58:07,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136307782] [2021-08-27 04:58:07,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:58:07,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:58:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:58:07,324 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 35 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) [2021-08-27 04:58:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:11,622 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2021-08-27 04:58:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-27 04:58:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 35 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 95 [2021-08-27 04:58:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:11,624 INFO L225 Difference]: With dead ends: 158 [2021-08-27 04:58:11,624 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 04:58:11,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3302.8ms TimeCoverageRelationStatistics Valid=595, Invalid=5409, Unknown=2, NotChecked=0, Total=6006 [2021-08-27 04:58:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 04:58:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-08-27 04:58:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 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) [2021-08-27 04:58:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-08-27 04:58:11,626 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 95 [2021-08-27 04:58:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:11,627 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-08-27 04:58:11,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 35 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) [2021-08-27 04:58:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-08-27 04:58:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-27 04:58:11,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:11,627 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:58:11,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-27 04:58:11,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 04:58:11,845 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:58:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash 811012419, now seen corresponding path program 10 times [2021-08-27 04:58:11,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:11,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548085330] [2021-08-27 04:58:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:11,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:12,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:58:12,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:12,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548085330] [2021-08-27 04:58:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548085330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:12,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364059949] [2021-08-27 04:58:12,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:58:12,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:12,217 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:12,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:58:13,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:58:13,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-27 04:58:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:13,191 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 [2021-08-27 04:58:13,194 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 [2021-08-27 04:58:13,973 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 15 treesize of output 11 [2021-08-27 04:58:14,039 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-27 04:58:14,040 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 32 treesize of output 31 [2021-08-27 04:58:15,338 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:58:15,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 50 treesize of output 42 [2021-08-27 04:58:15,347 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-27 04:58:15,347 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 28 [2021-08-27 04:58:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 112 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:58:15,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364059949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:15,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:15,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-08-27 04:58:15,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24322779] [2021-08-27 04:58:15,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:58:15,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:15,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:58:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:58:15,359 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 39 states, 39 states have (on average 4.256410256410256) internal successors, (166), 36 states have internal predecessors, (166), 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) [2021-08-27 04:58:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:47,949 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2021-08-27 04:58:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:58:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.256410256410256) internal successors, (166), 36 states have internal predecessors, (166), 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 107 [2021-08-27 04:58:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:47,950 INFO L225 Difference]: With dead ends: 189 [2021-08-27 04:58:47,950 INFO L226 Difference]: Without dead ends: 115 [2021-08-27 04:58:47,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 28260.1ms TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:58:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-27 04:58:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2021-08-27 04:58:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 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) [2021-08-27 04:58:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-08-27 04:58:47,952 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2021-08-27 04:58:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:47,952 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-08-27 04:58:47,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.256410256410256) internal successors, (166), 36 states have internal predecessors, (166), 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) [2021-08-27 04:58:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-08-27 04:58:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-27 04:58:47,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:47,953 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:47,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:48,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-27 04:58:48,159 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:58:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1792600582, now seen corresponding path program 11 times [2021-08-27 04:58:48,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:48,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006806601] [2021-08-27 04:58:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:58:48,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006806601] [2021-08-27 04:58:48,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006806601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:48,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471148052] [2021-08-27 04:58:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:58:48,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:48,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:48,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:58:50,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-27 04:58:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:50,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-27 04:58:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:58:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471148052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:50,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:50,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 30 [2021-08-27 04:58:50,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105849420] [2021-08-27 04:58:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:58:50,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:58:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:58:51,000 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 31 states, 30 states have (on average 4.533333333333333) internal successors, (136), 28 states have internal predecessors, (136), 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) [2021-08-27 04:58:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:51,835 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-08-27 04:58:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:58:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.533333333333333) internal successors, (136), 28 states have internal predecessors, (136), 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 [2021-08-27 04:58:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:51,836 INFO L225 Difference]: With dead ends: 123 [2021-08-27 04:58:51,836 INFO L226 Difference]: Without dead ends: 123 [2021-08-27 04:58:51,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:58:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-27 04:58:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-08-27 04:58:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 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) [2021-08-27 04:58:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-08-27 04:58:51,838 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2021-08-27 04:58:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:51,839 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-08-27 04:58:51,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.533333333333333) internal successors, (136), 28 states have internal predecessors, (136), 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) [2021-08-27 04:58:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-08-27 04:58:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-08-27 04:58:51,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:51,839 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:51,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:52,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:52,051 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:58:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:52,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1479706071, now seen corresponding path program 12 times [2021-08-27 04:58:52,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:52,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580280487] [2021-08-27 04:58:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:52,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 152 proven. 68 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:58:52,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:52,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580280487] [2021-08-27 04:58:52,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580280487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:52,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137066129] [2021-08-27 04:58:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:58:52,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:52,407 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:52,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:58:53,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-27 04:58:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:53,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-27 04:58:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:53,807 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:58:53,807 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 [2021-08-27 04:58:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 169 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:58:54,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137066129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:54,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:54,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-08-27 04:58:54,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428700052] [2021-08-27 04:58:54,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:58:54,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:58:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:58:54,794 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 36 states have internal predecessors, (180), 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) [2021-08-27 04:58:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:55,429 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-08-27 04:58:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:58:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 36 states have internal predecessors, (180), 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 119 [2021-08-27 04:58:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:55,430 INFO L225 Difference]: With dead ends: 184 [2021-08-27 04:58:55,430 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 04:58:55,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=370, Invalid=2080, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 04:58:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 04:58:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-08-27 04:58:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 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) [2021-08-27 04:58:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-08-27 04:58:55,433 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2021-08-27 04:58:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:55,433 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-08-27 04:58:55,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 36 states have internal predecessors, (180), 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) [2021-08-27 04:58:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-08-27 04:58:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-27 04:58:55,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:55,433 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:58:55,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:55,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:55,641 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:58:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:55,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1184835156, now seen corresponding path program 13 times [2021-08-27 04:58:55,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:55,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223864104] [2021-08-27 04:58:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:55,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:56,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:58:56,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:56,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223864104] [2021-08-27 04:58:56,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223864104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:56,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333659279] [2021-08-27 04:58:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:58:56,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:56,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:56,092 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:56,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:58:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-27 04:58:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:57,408 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 [2021-08-27 04:58:58,016 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 21 treesize of output 17 [2021-08-27 04:58:58,071 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:58:58,072 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 35 treesize of output 34 [2021-08-27 04:58:59,640 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:58:59,641 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 38 treesize of output 23 [2021-08-27 04:58:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:58:59,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333659279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:59,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:59,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-08-27 04:58:59,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309388490] [2021-08-27 04:58:59,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:58:59,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:59,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:58:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:58:59,652 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 40 states have internal predecessors, (190), 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) [2021-08-27 04:59:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:28,948 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2021-08-27 04:59:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:59:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 40 states have internal predecessors, (190), 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 123 [2021-08-27 04:59:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:28,949 INFO L225 Difference]: With dead ends: 217 [2021-08-27 04:59:28,949 INFO L226 Difference]: Without dead ends: 131 [2021-08-27 04:59:28,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 28553.9ms TimeCoverageRelationStatistics Valid=216, Invalid=2976, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 04:59:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-27 04:59:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-08-27 04:59:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 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) [2021-08-27 04:59:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-08-27 04:59:28,951 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 123 [2021-08-27 04:59:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:28,951 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-08-27 04:59:28,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 40 states have internal predecessors, (190), 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) [2021-08-27 04:59:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-08-27 04:59:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-27 04:59:28,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:28,952 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:28,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:29,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:29,161 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:59:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1768502161, now seen corresponding path program 14 times [2021-08-27 04:59:29,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:29,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958676208] [2021-08-27 04:59:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:29,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:29,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:59:29,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:29,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958676208] [2021-08-27 04:59:29,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958676208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:29,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54604433] [2021-08-27 04:59:29,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:59:29,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:29,525 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:59:29,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:59:31,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:59:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-27 04:59:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:59:31,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54604433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:31,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:31,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-08-27 04:59:31,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61564] [2021-08-27 04:59:31,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:59:31,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:59:31,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:59:31,734 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 32 states have internal predecessors, (152), 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) [2021-08-27 04:59:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:32,829 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2021-08-27 04:59:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:59:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 32 states have internal predecessors, (152), 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 127 [2021-08-27 04:59:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:32,830 INFO L225 Difference]: With dead ends: 139 [2021-08-27 04:59:32,830 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 04:59:32,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:59:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 04:59:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-08-27 04:59:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 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) [2021-08-27 04:59:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2021-08-27 04:59:32,832 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 127 [2021-08-27 04:59:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:32,832 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2021-08-27 04:59:32,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 32 states have internal predecessors, (152), 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) [2021-08-27 04:59:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2021-08-27 04:59:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-27 04:59:32,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:32,833 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:32,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:33,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:33,034 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:59:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash 10150802, now seen corresponding path program 15 times [2021-08-27 04:59:33,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:33,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920342901] [2021-08-27 04:59:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:33,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:33,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 205 proven. 93 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:59:33,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:33,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920342901] [2021-08-27 04:59:33,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920342901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:33,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049889385] [2021-08-27 04:59:33,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:59:33,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:33,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:33,345 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:59:33,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:59:35,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-27 04:59:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-27 04:59:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:35,265 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:35,266 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 [2021-08-27 04:59:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 225 proven. 73 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:59:36,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049889385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:36,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:36,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2021-08-27 04:59:36,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885764199] [2021-08-27 04:59:36,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:59:36,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:59:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:59:36,422 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 40 states have internal predecessors, (204), 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) [2021-08-27 04:59:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:37,097 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2021-08-27 04:59:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:59:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 40 states have internal predecessors, (204), 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 135 [2021-08-27 04:59:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:37,098 INFO L225 Difference]: With dead ends: 208 [2021-08-27 04:59:37,098 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 04:59:37,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=450, Invalid=2520, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 04:59:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 04:59:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-08-27 04:59:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 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) [2021-08-27 04:59:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-08-27 04:59:37,101 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 135 [2021-08-27 04:59:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:37,101 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-08-27 04:59:37,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 40 states have internal predecessors, (204), 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) [2021-08-27 04:59:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-08-27 04:59:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-27 04:59:37,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:37,102 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:59:37,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:37,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-27 04:59:37,309 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:59:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:37,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1064796907, now seen corresponding path program 16 times [2021-08-27 04:59:37,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:37,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543797489] [2021-08-27 04:59:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:37,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:37,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:59:37,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:37,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543797489] [2021-08-27 04:59:37,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543797489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:37,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940525729] [2021-08-27 04:59:37,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:59:37,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:37,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:37,857 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:59:37,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:59:39,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:59:39,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-27 04:59:39,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:39,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:39,484 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 [2021-08-27 04:59:39,494 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 [2021-08-27 04:59:40,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-08-27 04:59:40,600 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 [2021-08-27 04:59:40,667 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:59:40,667 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 37 treesize of output 36 [2021-08-27 04:59:43,224 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-08-27 04:59:43,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 41 [2021-08-27 04:59:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:59:43,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940525729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:43,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:43,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30] total 52 [2021-08-27 04:59:43,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789270332] [2021-08-27 04:59:43,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 04:59:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 04:59:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2535, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:59:43,260 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 49 states have internal predecessors, (214), 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) [2021-08-27 05:00:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:25,170 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-08-27 05:00:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 05:00:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 49 states have internal predecessors, (214), 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 [2021-08-27 05:00:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:25,171 INFO L225 Difference]: With dead ends: 245 [2021-08-27 05:00:25,171 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 05:00:25,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 34915.9ms TimeCoverageRelationStatistics Valid=296, Invalid=5106, Unknown=0, NotChecked=0, Total=5402 [2021-08-27 05:00:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 05:00:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-08-27 05:00:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 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) [2021-08-27 05:00:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-08-27 05:00:25,174 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 139 [2021-08-27 05:00:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:25,174 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-08-27 05:00:25,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 49 states have internal predecessors, (214), 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) [2021-08-27 05:00:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-08-27 05:00:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-08-27 05:00:25,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:25,174 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:00:25,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 05:00:25,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-27 05:00:25,385 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:00:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1728149032, now seen corresponding path program 17 times [2021-08-27 05:00:25,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:25,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710414690] [2021-08-27 05:00:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:25,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:25,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 66 proven. 286 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 05:00:25,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:25,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710414690] [2021-08-27 05:00:25,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710414690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:25,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824566826] [2021-08-27 05:00:25,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 05:00:25,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:25,897 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:00:25,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 05:00:28,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-27 05:00:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-27 05:00:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 05:00:30,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824566826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:30,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:30,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 36 [2021-08-27 05:00:30,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44347387] [2021-08-27 05:00:30,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 05:00:30,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 05:00:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 05:00:30,034 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 37 states, 36 states have (on average 4.666666666666667) internal successors, (168), 34 states have internal predecessors, (168), 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) [2021-08-27 05:00:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:31,262 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2021-08-27 05:00:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 05:00:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.666666666666667) internal successors, (168), 34 states have internal predecessors, (168), 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 143 [2021-08-27 05:00:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:31,263 INFO L225 Difference]: With dead ends: 155 [2021-08-27 05:00:31,263 INFO L226 Difference]: Without dead ends: 155 [2021-08-27 05:00:31,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 883.8ms TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 05:00:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-27 05:00:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-08-27 05:00:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 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) [2021-08-27 05:00:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-08-27 05:00:31,266 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2021-08-27 05:00:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:31,266 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-08-27 05:00:31,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.666666666666667) internal successors, (168), 34 states have internal predecessors, (168), 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) [2021-08-27 05:00:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-08-27 05:00:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-27 05:00:31,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:31,267 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:00:31,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-27 05:00:31,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-27 05:00:31,489 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:00:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 34023419, now seen corresponding path program 18 times [2021-08-27 05:00:31,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:31,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482901323] [2021-08-27 05:00:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:31,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:31,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 266 proven. 122 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 05:00:31,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:31,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482901323] [2021-08-27 05:00:31,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482901323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:31,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225532363] [2021-08-27 05:00:31,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 05:00:31,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:31,864 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:00:31,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 05:00:34,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-27 05:00:34,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-27 05:00:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:34,423 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:00:34,424 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 [2021-08-27 05:00:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 289 proven. 99 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 05:00:35,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225532363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:35,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:35,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 47 [2021-08-27 05:00:35,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805278807] [2021-08-27 05:00:35,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-27 05:00:35,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-27 05:00:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 05:00:35,598 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 44 states have internal predecessors, (228), 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) [2021-08-27 05:00:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:36,319 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-08-27 05:00:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 05:00:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 44 states have internal predecessors, (228), 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 151 [2021-08-27 05:00:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:36,321 INFO L225 Difference]: With dead ends: 232 [2021-08-27 05:00:36,322 INFO L226 Difference]: Without dead ends: 159 [2021-08-27 05:00:36,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 782.9ms TimeCoverageRelationStatistics Valid=539, Invalid=3001, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 05:00:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-27 05:00:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-08-27 05:00:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 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) [2021-08-27 05:00:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-08-27 05:00:36,324 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 151 [2021-08-27 05:00:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:36,325 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-08-27 05:00:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 44 states have internal predecessors, (228), 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) [2021-08-27 05:00:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-08-27 05:00:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-08-27 05:00:36,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:36,329 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 05:00:36,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 05:00:36,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:36,541 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:00:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 606796670, now seen corresponding path program 19 times [2021-08-27 05:00:36,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:36,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596607408] [2021-08-27 05:00:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:36,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 05:00:37,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:37,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596607408] [2021-08-27 05:00:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596607408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:37,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084822900] [2021-08-27 05:00:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 05:00:37,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:37,147 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:00:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 05:00:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-27 05:00:39,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:39,326 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 [2021-08-27 05:00:40,195 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 21 treesize of output 17 [2021-08-27 05:00:40,257 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 05:00:40,258 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 35 treesize of output 34 [2021-08-27 05:00:42,431 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 05:00:42,431 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 38 treesize of output 23 [2021-08-27 05:00:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 05:00:42,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084822900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:42,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:42,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-08-27 05:00:42,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450012465] [2021-08-27 05:00:42,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 05:00:42,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 05:00:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2427, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 05:00:42,443 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 51 states, 51 states have (on average 4.666666666666667) internal successors, (238), 48 states have internal predecessors, (238), 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) [2021-08-27 05:01:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:23,507 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2021-08-27 05:01:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 05:01:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.666666666666667) internal successors, (238), 48 states have internal predecessors, (238), 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 155 [2021-08-27 05:01:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:23,508 INFO L225 Difference]: With dead ends: 273 [2021-08-27 05:01:23,508 INFO L226 Difference]: Without dead ends: 163 [2021-08-27 05:01:23,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 40097.1ms TimeCoverageRelationStatistics Valid=252, Invalid=4170, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 05:01:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-27 05:01:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-08-27 05:01:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 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) [2021-08-27 05:01:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-08-27 05:01:23,510 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2021-08-27 05:01:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:23,510 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-08-27 05:01:23,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.666666666666667) internal successors, (238), 48 states have internal predecessors, (238), 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) [2021-08-27 05:01:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-08-27 05:01:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-27 05:01:23,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:23,511 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:01:23,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:23,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-27 05:01:23,721 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:01:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1200807359, now seen corresponding path program 20 times [2021-08-27 05:01:23,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:23,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157838634] [2021-08-27 05:01:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:23,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:24,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 05:01:24,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:24,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157838634] [2021-08-27 05:01:24,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157838634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:24,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194712980] [2021-08-27 05:01:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:01:24,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:24,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:24,322 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:24,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-27 05:01:26,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:01:26,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-27 05:01:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 05:01:27,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194712980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:27,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:27,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 40 [2021-08-27 05:01:27,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171806681] [2021-08-27 05:01:27,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 05:01:27,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 05:01:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 05:01:27,735 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 41 states, 40 states have (on average 4.6) internal successors, (184), 38 states have internal predecessors, (184), 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) [2021-08-27 05:01:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:29,073 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-08-27 05:01:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 05:01:29,074 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.6) internal successors, (184), 38 states have internal predecessors, (184), 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 159 [2021-08-27 05:01:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:29,074 INFO L225 Difference]: With dead ends: 171 [2021-08-27 05:01:29,074 INFO L226 Difference]: Without dead ends: 171 [2021-08-27 05:01:29,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1038.7ms TimeCoverageRelationStatistics Valid=334, Invalid=2746, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 05:01:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-27 05:01:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-08-27 05:01:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 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) [2021-08-27 05:01:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-08-27 05:01:29,077 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2021-08-27 05:01:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:29,077 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-08-27 05:01:29,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.6) internal successors, (184), 38 states have internal predecessors, (184), 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) [2021-08-27 05:01:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-08-27 05:01:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-08-27 05:01:29,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:29,078 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:01:29,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-27 05:01:29,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-27 05:01:29,284 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:01:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1164920676, now seen corresponding path program 21 times [2021-08-27 05:01:29,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:29,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098539217] [2021-08-27 05:01:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:29,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 335 proven. 155 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 05:01:29,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:29,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098539217] [2021-08-27 05:01:29,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098539217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:29,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606120938] [2021-08-27 05:01:29,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:01:29,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:29,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:29,728 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:29,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-27 05:01:33,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-27 05:01:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-27 05:01:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:33,552 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:01:33,553 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 [2021-08-27 05:01:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 361 proven. 129 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 05:01:35,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606120938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:35,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:35,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2021-08-27 05:01:35,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651864899] [2021-08-27 05:01:35,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 05:01:35,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 05:01:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 05:01:35,173 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 51 states, 51 states have (on average 4.9411764705882355) internal successors, (252), 48 states have internal predecessors, (252), 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) [2021-08-27 05:01:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:36,069 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2021-08-27 05:01:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 05:01:36,069 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.9411764705882355) internal successors, (252), 48 states have internal predecessors, (252), 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 167 [2021-08-27 05:01:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:36,070 INFO L225 Difference]: With dead ends: 256 [2021-08-27 05:01:36,070 INFO L226 Difference]: Without dead ends: 175 [2021-08-27 05:01:36,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1040.5ms TimeCoverageRelationStatistics Valid=637, Invalid=3523, Unknown=0, NotChecked=0, Total=4160 [2021-08-27 05:01:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-27 05:01:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-08-27 05:01:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 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) [2021-08-27 05:01:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-08-27 05:01:36,073 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2021-08-27 05:01:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:36,073 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-08-27 05:01:36,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.9411764705882355) internal successors, (252), 48 states have internal predecessors, (252), 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) [2021-08-27 05:01:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-08-27 05:01:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-08-27 05:01:36,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:36,074 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 05:01:36,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:36,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:36,275 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:01:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1839551719, now seen corresponding path program 22 times [2021-08-27 05:01:36,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:36,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700581196] [2021-08-27 05:01:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:36,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:36,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 05:01:36,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:36,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700581196] [2021-08-27 05:01:36,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700581196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:36,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617722149] [2021-08-27 05:01:36,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 05:01:36,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:36,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:36,967 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:36,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-27 05:01:39,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 05:01:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-27 05:01:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:39,599 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 [2021-08-27 05:01:39,606 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 [2021-08-27 05:01:41,239 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 [2021-08-27 05:01:41,329 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 05:01:41,329 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 [2021-08-27 05:01:43,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 05:01:43,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 48 [2021-08-27 05:01:43,902 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 05:01:43,902 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 48 treesize of output 33 [2021-08-27 05:01:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 352 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 05:01:43,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617722149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:43,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:43,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2021-08-27 05:01:43,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424630591] [2021-08-27 05:01:43,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-27 05:01:43,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-27 05:01:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 05:01:43,940 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 54 states, 54 states have (on average 4.851851851851852) internal successors, (262), 51 states have internal predecessors, (262), 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) [2021-08-27 05:02:24,504 WARN L207 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-08-27 05:02:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:02:24,523 INFO L93 Difference]: Finished difference Result 301 states and 304 transitions. [2021-08-27 05:02:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 05:02:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.851851851851852) internal successors, (262), 51 states have internal predecessors, (262), 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 171 [2021-08-27 05:02:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:02:24,524 INFO L225 Difference]: With dead ends: 301 [2021-08-27 05:02:24,524 INFO L226 Difference]: Without dead ends: 179 [2021-08-27 05:02:24,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 37343.9ms TimeCoverageRelationStatistics Valid=471, Invalid=6009, Unknown=0, NotChecked=0, Total=6480 [2021-08-27 05:02:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-27 05:02:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2021-08-27 05:02:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 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) [2021-08-27 05:02:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2021-08-27 05:02:24,527 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 171 [2021-08-27 05:02:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:02:24,527 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2021-08-27 05:02:24,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.851851851851852) internal successors, (262), 51 states have internal predecessors, (262), 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) [2021-08-27 05:02:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2021-08-27 05:02:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-27 05:02:24,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:02:24,528 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:02:24,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-27 05:02:24,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:02:24,741 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:02:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:02:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash -432040534, now seen corresponding path program 23 times [2021-08-27 05:02:24,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:02:24,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831713235] [2021-08-27 05:02:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:02:24,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:02:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:02:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 120 proven. 440 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 05:02:25,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:02:25,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831713235] [2021-08-27 05:02:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831713235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:25,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932861208] [2021-08-27 05:02:25,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 05:02:25,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:02:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:02:25,204 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:02:25,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-27 05:02:28,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-27 05:02:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:02:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-27 05:02:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:02:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 05:02:29,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932861208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:29,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:02:29,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 39 [2021-08-27 05:02:29,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701323810] [2021-08-27 05:02:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 05:02:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:02:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 05:02:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 05:02:29,850 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 40 states, 39 states have (on average 5.717948717948718) internal successors, (223), 38 states have internal predecessors, (223), 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) [2021-08-27 05:02:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:02:31,214 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2021-08-27 05:02:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 05:02:31,215 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.717948717948718) internal successors, (223), 38 states have internal predecessors, (223), 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 175 [2021-08-27 05:02:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:02:31,215 INFO L225 Difference]: With dead ends: 187 [2021-08-27 05:02:31,216 INFO L226 Difference]: Without dead ends: 187 [2021-08-27 05:02:31,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 895.7ms TimeCoverageRelationStatistics Valid=261, Invalid=2819, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 05:02:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-27 05:02:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-08-27 05:02:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 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) [2021-08-27 05:02:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-08-27 05:02:31,218 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2021-08-27 05:02:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:02:31,218 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-08-27 05:02:31,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.717948717948718) internal successors, (223), 38 states have internal predecessors, (223), 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) [2021-08-27 05:02:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-08-27 05:02:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-08-27 05:02:31,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:02:31,219 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:02:31,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-27 05:02:31,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-27 05:02:31,444 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:02:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:02:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash 254820813, now seen corresponding path program 24 times [2021-08-27 05:02:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:02:31,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286784825] [2021-08-27 05:02:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:02:31,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:02:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:31,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:02:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 412 proven. 192 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 05:02:31,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:02:31,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286784825] [2021-08-27 05:02:31,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286784825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:31,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104260379] [2021-08-27 05:02:31,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 05:02:31,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:02:31,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:02:31,921 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:02:31,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-27 05:02:36,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-27 05:02:36,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:02:36,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-27 05:02:36,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:02:36,233 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:02:36,233 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 [2021-08-27 05:02:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 441 proven. 163 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 05:02:37,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104260379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:37,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:02:37,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 55 [2021-08-27 05:02:37,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325703648] [2021-08-27 05:02:37,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 05:02:37,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:02:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 05:02:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2523, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 05:02:37,387 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 52 states have internal predecessors, (276), 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) [2021-08-27 05:02:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:02:38,087 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2021-08-27 05:02:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 05:02:38,087 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 52 states have internal predecessors, (276), 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 [2021-08-27 05:02:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:02:38,088 INFO L225 Difference]: With dead ends: 280 [2021-08-27 05:02:38,088 INFO L226 Difference]: Without dead ends: 191 [2021-08-27 05:02:38,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 805.1ms TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2021-08-27 05:02:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-27 05:02:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-08-27 05:02:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 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) [2021-08-27 05:02:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2021-08-27 05:02:38,090 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 183 [2021-08-27 05:02:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:02:38,091 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2021-08-27 05:02:38,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 52 states have internal predecessors, (276), 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) [2021-08-27 05:02:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2021-08-27 05:02:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-27 05:02:38,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:02:38,092 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 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] [2021-08-27 05:02:38,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-27 05:02:38,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:02:38,308 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:02:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:02:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -782988976, now seen corresponding path program 25 times [2021-08-27 05:02:38,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:02:38,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355018170] [2021-08-27 05:02:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:02:38,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:02:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:38,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:02:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 05:02:39,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:02:39,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355018170] [2021-08-27 05:02:39,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355018170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:39,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646447097] [2021-08-27 05:02:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 05:02:39,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:02:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:02:39,004 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:02:39,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-27 05:02:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 126 conjunts are in the unsatisfiable core [2021-08-27 05:02:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:02:42,101 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 [2021-08-27 05:02:43,029 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 21 treesize of output 17 [2021-08-27 05:02:43,101 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 05:02:43,101 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 35 treesize of output 34 [2021-08-27 05:02:45,785 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 05:02:45,789 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 38 treesize of output 23 [2021-08-27 05:02:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 05:02:45,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646447097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:45,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:02:45,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-08-27 05:02:45,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72475830] [2021-08-27 05:02:45,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-27 05:02:45,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:02:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-27 05:02:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 05:02:45,807 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 59 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 56 states have internal predecessors, (286), 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) [2021-08-27 05:03:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:35,430 INFO L93 Difference]: Finished difference Result 329 states and 332 transitions. [2021-08-27 05:03:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 05:03:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 56 states have internal predecessors, (286), 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 187 [2021-08-27 05:03:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:35,431 INFO L225 Difference]: With dead ends: 329 [2021-08-27 05:03:35,431 INFO L226 Difference]: Without dead ends: 195 [2021-08-27 05:03:35,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 48440.2ms TimeCoverageRelationStatistics Valid=288, Invalid=5564, Unknown=0, NotChecked=0, Total=5852 [2021-08-27 05:03:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-27 05:03:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-08-27 05:03:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 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) [2021-08-27 05:03:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2021-08-27 05:03:35,438 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 187 [2021-08-27 05:03:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:35,438 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2021-08-27 05:03:35,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 56 states have internal predecessors, (286), 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) [2021-08-27 05:03:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2021-08-27 05:03:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-08-27 05:03:35,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:35,438 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:35,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-27 05:03:35,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-27 05:03:35,661 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:03:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1093475309, now seen corresponding path program 26 times [2021-08-27 05:03:35,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:35,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491804070] [2021-08-27 05:03:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:35,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 153 proven. 529 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 05:03:36,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:36,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491804070] [2021-08-27 05:03:36,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491804070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:36,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234390359] [2021-08-27 05:03:36,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:03:36,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:36,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:36,246 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:36,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-27 05:03:39,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:03:39,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:03:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 213 conjunts are in the unsatisfiable core [2021-08-27 05:03:39,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:03:39,980 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 [2021-08-27 05:03:41,833 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-27 05:03:41,834 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 [2021-08-27 05:03:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 05:03:41,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234390359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:41,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:03:41,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 62 [2021-08-27 05:03:41,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571558219] [2021-08-27 05:03:41,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-27 05:03:41,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:03:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-27 05:03:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3611, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 05:03:41,891 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 62 states, 62 states have (on average 4.741935483870968) internal successors, (294), 59 states have internal predecessors, (294), 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) [2021-08-27 05:03:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:49,019 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2021-08-27 05:03:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-27 05:03:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 4.741935483870968) internal successors, (294), 59 states have internal predecessors, (294), 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 191 [2021-08-27 05:03:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:49,020 INFO L225 Difference]: With dead ends: 302 [2021-08-27 05:03:49,021 INFO L226 Difference]: Without dead ends: 210 [2021-08-27 05:03:49,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 4343.9ms TimeCoverageRelationStatistics Valid=823, Invalid=13939, Unknown=0, NotChecked=0, Total=14762 [2021-08-27 05:03:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-08-27 05:03:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-08-27 05:03:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.015075376884422) internal successors, (202), 199 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) [2021-08-27 05:03:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2021-08-27 05:03:49,023 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 191 [2021-08-27 05:03:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:49,023 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2021-08-27 05:03:49,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 4.741935483870968) internal successors, (294), 59 states have internal predecessors, (294), 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) [2021-08-27 05:03:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2021-08-27 05:03:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-08-27 05:03:49,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:49,024 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:49,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-27 05:03:49,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:49,225 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:03:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash 781555897, now seen corresponding path program 27 times [2021-08-27 05:03:49,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:49,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470110814] [2021-08-27 05:03:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:49,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 05:03:50,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:50,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470110814] [2021-08-27 05:03:50,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470110814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:50,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260138347] [2021-08-27 05:03:50,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:03:50,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:50,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:50,295 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:50,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-27 05:03:55,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-27 05:03:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:03:55,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 166 conjunts are in the unsatisfiable core [2021-08-27 05:03:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:03:55,726 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 [2021-08-27 05:03:58,254 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 21 treesize of output 17 [2021-08-27 05:03:58,337 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-08-27 05:03:58,337 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 34 treesize of output 33 [2021-08-27 05:04:01,342 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-27 05:04:01,343 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 36 treesize of output 23 [2021-08-27 05:04:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 967 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:04:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260138347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:01,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:04:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 43] total 73 [2021-08-27 05:04:01,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796086911] [2021-08-27 05:04:01,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-27 05:04:01,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:04:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-27 05:04:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5059, Unknown=0, NotChecked=0, Total=5256 [2021-08-27 05:04:01,355 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 73 states, 73 states have (on average 4.794520547945205) internal successors, (350), 70 states have internal predecessors, (350), 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) [2021-08-27 05:04:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:04:06,113 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2021-08-27 05:04:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-27 05:04:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.794520547945205) internal successors, (350), 70 states have internal predecessors, (350), 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 203 [2021-08-27 05:04:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:04:06,114 INFO L225 Difference]: With dead ends: 357 [2021-08-27 05:04:06,114 INFO L226 Difference]: Without dead ends: 211 [2021-08-27 05:04:06,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 4020.4ms TimeCoverageRelationStatistics Valid=422, Invalid=9678, Unknown=0, NotChecked=0, Total=10100 [2021-08-27 05:04:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-27 05:04:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-08-27 05:04:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 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) [2021-08-27 05:04:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2021-08-27 05:04:06,117 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2021-08-27 05:04:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:04:06,117 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2021-08-27 05:04:06,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.794520547945205) internal successors, (350), 70 states have internal predecessors, (350), 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) [2021-08-27 05:04:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2021-08-27 05:04:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-08-27 05:04:06,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:04:06,118 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:04:06,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-27 05:04:06,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-27 05:04:06,331 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:04:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:04:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1987834500, now seen corresponding path program 28 times [2021-08-27 05:04:06,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:04:06,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350405017] [2021-08-27 05:04:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:04:06,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:04:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:04:06,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:04:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:04:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 190 proven. 626 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 05:04:06,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:04:06,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350405017] [2021-08-27 05:04:06,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350405017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:06,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521658330] [2021-08-27 05:04:06,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 05:04:06,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:04:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:04:06,951 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:04:06,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-27 05:04:10,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 05:04:10,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:04:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 135 conjunts are in the unsatisfiable core [2021-08-27 05:04:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:04:10,686 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:04:10,687 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 [2021-08-27 05:04:10,696 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 [2021-08-27 05:04:12,700 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 [2021-08-27 05:04:12,768 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 05:04:12,769 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 [2021-08-27 05:04:16,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:04:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:04:16,102 INFO L354 Elim1Store]: treesize reduction 64, result has 13.5 percent of original size [2021-08-27 05:04:16,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 28 [2021-08-27 05:04:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 242 proven. 574 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 05:04:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521658330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:16,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:04:16,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 66 [2021-08-27 05:04:16,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903182819] [2021-08-27 05:04:16,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-27 05:04:16,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:04:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-27 05:04:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=4101, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 05:04:16,279 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 67 states, 66 states have (on average 4.878787878787879) internal successors, (322), 64 states have internal predecessors, (322), 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) [2021-08-27 05:04:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:04:21,953 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-08-27 05:04:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 05:04:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.878787878787879) internal successors, (322), 64 states have internal predecessors, (322), 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 207 [2021-08-27 05:04:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:04:21,955 INFO L225 Difference]: With dead ends: 219 [2021-08-27 05:04:21,955 INFO L226 Difference]: Without dead ends: 219 [2021-08-27 05:04:21,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 4326.1ms TimeCoverageRelationStatistics Valid=623, Invalid=7567, Unknown=0, NotChecked=0, Total=8190 [2021-08-27 05:04:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-27 05:04:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2021-08-27 05:04:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 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) [2021-08-27 05:04:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2021-08-27 05:04:21,957 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 207 [2021-08-27 05:04:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:04:21,957 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2021-08-27 05:04:21,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.878787878787879) internal successors, (322), 64 states have internal predecessors, (322), 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) [2021-08-27 05:04:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2021-08-27 05:04:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-08-27 05:04:21,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:04:21,958 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:04:21,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-27 05:04:22,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-27 05:04:22,169 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:04:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:04:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1640970337, now seen corresponding path program 29 times [2021-08-27 05:04:22,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:04:22,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889902695] [2021-08-27 05:04:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:04:22,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:04:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:04:22,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:04:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:04:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 590 proven. 278 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-27 05:04:22,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:04:22,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889902695] [2021-08-27 05:04:22,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889902695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:22,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371392842] [2021-08-27 05:04:22,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 05:04:22,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:04:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:04:22,675 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:04:22,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-27 05:04:30,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-27 05:04:30,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:04:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 96 conjunts are in the unsatisfiable core [2021-08-27 05:04:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:04:30,557 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:04:30,557 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 [2021-08-27 05:04:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 614 proven. 254 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-27 05:04:32,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371392842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:32,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:04:32,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2021-08-27 05:04:32,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153451831] [2021-08-27 05:04:32,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-27 05:04:32,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:04:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-27 05:04:32,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=3428, Unknown=0, NotChecked=0, Total=4032 [2021-08-27 05:04:32,154 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 64 states, 64 states have (on average 5.0625) internal successors, (324), 61 states have internal predecessors, (324), 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) [2021-08-27 05:04:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:04:33,350 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2021-08-27 05:04:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-27 05:04:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.0625) internal successors, (324), 61 states have internal predecessors, (324), 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 215 [2021-08-27 05:04:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:04:33,352 INFO L225 Difference]: With dead ends: 328 [2021-08-27 05:04:33,352 INFO L226 Difference]: Without dead ends: 223 [2021-08-27 05:04:33,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 1460.1ms TimeCoverageRelationStatistics Valid=1375, Invalid=6997, Unknown=0, NotChecked=0, Total=8372 [2021-08-27 05:04:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-27 05:04:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2021-08-27 05:04:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 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) [2021-08-27 05:04:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2021-08-27 05:04:33,354 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2021-08-27 05:04:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:04:33,355 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2021-08-27 05:04:33,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.0625) internal successors, (324), 61 states have internal predecessors, (324), 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) [2021-08-27 05:04:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2021-08-27 05:04:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-08-27 05:04:33,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:04:33,356 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:04:33,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-27 05:04:33,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-27 05:04:33,569 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrncmpErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 05:04:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:04:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash 264602402, now seen corresponding path program 30 times [2021-08-27 05:04:33,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:04:33,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087585397] [2021-08-27 05:04:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:04:33,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:04:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:04:34,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:04:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:04:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-27 05:04:34,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:04:34,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087585397] [2021-08-27 05:04:34,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087585397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:34,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98718706] [2021-08-27 05:04:34,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 05:04:34,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:04:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:04:34,573 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:04:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-27 05:04:44,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-27 05:04:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:04:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-27 05:04:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:04:45,048 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 [2021-08-27 05:04:45,053 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 [2021-08-27 05:04:46,611 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 15 treesize of output 11 [2021-08-27 05:04:46,674 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-08-27 05:04:46,674 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 31 treesize of output 30 [2021-08-27 05:04:47,876 INFO L354 Elim1Store]: treesize reduction 43, result has 18.9 percent of original size [2021-08-27 05:04:47,877 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 36 treesize of output 24 [2021-08-27 05:04:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-08-27 05:04:48,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98718706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:48,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:04:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 9] total 43 [2021-08-27 05:04:48,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672852157] [2021-08-27 05:04:48,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 05:04:48,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:04:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 05:04:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1720, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 05:04:48,009 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 43 states, 43 states have (on average 4.72093023255814) internal successors, (203), 40 states have internal predecessors, (203), 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) [2021-08-27 05:04:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:04:53,953 INFO L93 Difference]: Finished difference Result 384 states and 387 transitions. [2021-08-27 05:04:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-27 05:04:53,953 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.72093023255814) internal successors, (203), 40 states have internal predecessors, (203), 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 219 [2021-08-27 05:04:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:04:53,954 INFO L225 Difference]: With dead ends: 384 [2021-08-27 05:04:53,954 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 05:04:53,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 4608.8ms TimeCoverageRelationStatistics Valid=746, Invalid=10596, Unknown=0, NotChecked=0, Total=11342 [2021-08-27 05:04:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 05:04:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 05:04:53,955 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) [2021-08-27 05:04:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 05:04:53,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-08-27 05:04:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:04:53,955 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 05:04:53,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.72093023255814) internal successors, (203), 40 states have internal predecessors, (203), 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) [2021-08-27 05:04:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 05:04:53,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 05:04:53,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:04:53,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:04:53,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:04:53,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr0REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr1REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr2REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr3REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr4REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr5REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr6REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr7REQUIRES_VIOLATION [2021-08-27 05:04:53,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr8REQUIRES_VIOLATION [2021-08-27 05:04:53,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrncmpErr9REQUIRES_VIOLATION [2021-08-27 05:04:53,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-27 05:04:54,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-27 05:04:54,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:04:54,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:04:54 BoogieIcfgContainer [2021-08-27 05:04:54,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:04:54,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:04:54,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:04:54,173 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:04:54,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:56:35" (3/4) ... [2021-08-27 05:04:54,175 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 05:04:54,192 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 05:04:54,204 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 05:04:54,205 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 05:04:54,205 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 05:04:54,205 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 05:04:54,205 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 05:04:54,205 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrncmp [2021-08-27 05:04:54,205 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 05:04:54,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2021-08-27 05:04:54,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-27 05:04:54,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:04:54,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:04:54,257 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:04:54,257 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:04:54,258 INFO L168 Benchmark]: Toolchain (without parser) took 499341.47 ms. Allocated memory was 65.0 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 44.5 MB in the beginning and 859.1 MB in the end (delta: -814.6 MB). Peak memory consumption was 614.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:54,258 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 65.0 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:04:54,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.35 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 42.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:54,260 INFO L168 Benchmark]: Boogie Preprocessor took 68.45 ms. Allocated memory is still 65.0 MB. Free memory was 42.3 MB in the beginning and 39.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:54,263 INFO L168 Benchmark]: RCFGBuilder took 632.14 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 39.9 MB in the beginning and 61.3 MB in the end (delta: -21.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:54,263 INFO L168 Benchmark]: TraceAbstraction took 498221.74 ms. Allocated memory was 90.2 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 60.4 MB in the beginning and 862.7 MB in the end (delta: -802.3 MB). Peak memory consumption was 600.0 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:54,263 INFO L168 Benchmark]: Witness Printer took 84.21 ms. Allocated memory is still 1.5 GB. Free memory was 862.7 MB in the beginning and 859.1 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:54,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 65.0 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 330.35 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 42.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.45 ms. Allocated memory is still 65.0 MB. Free memory was 42.3 MB in the beginning and 39.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 632.14 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 39.9 MB in the beginning and 61.3 MB in the end (delta: -21.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 498221.74 ms. Allocated memory was 90.2 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 60.4 MB in the beginning and 862.7 MB in the end (delta: -802.3 MB). Peak memory consumption was 600.0 MB. Max. memory is 16.1 GB. * Witness Printer took 84.21 ms. Allocated memory is still 1.5 GB. Free memory was 862.7 MB in the beginning and 859.1 MB in the end (delta: 3.6 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: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: 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: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: 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: 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: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: 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, 78 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 498178.6ms, OverallIterations: 61, TraceHistogramMax: 13, EmptinessCheckTime: 36.4ms, AutomataDifference: 336867.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2559 SDtfs, 8183 SDslu, 14742 SDs, 0 SdLazy, 83369 SolverSat, 1382 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 49004.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6232 GetRequests, 3923 SyntacticMatches, 28 SemanticMatches, 2281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30831 ImplicationChecksByTransitivity, 308306.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=60, InterpolantAutomatonStates: 1208, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 142.0ms AutomataMinimizationTime, 61 MinimizatonAttempts, 261 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 675.3ms SsaConstructionTime, 21149.5ms SatisfiabilityAnalysisTime, 75071.6ms InterpolantComputationTime, 9313 NumberOfCodeBlocks, 9124 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 9212 ConstructedInterpolants, 949 QuantifiedInterpolants, 108902 SizeOfPredicates, 823 NumberOfNonLiveVariables, 18595 ConjunctsInSsa, 2773 ConjunctsInUnsatCore, 101 InterpolantComputations, 23 PerfectInterpolantSequences, 13707/28120 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! [2021-08-27 05:04:54,474 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 05:04:54,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...