./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_cstrnlen-alloca-1.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 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 04:58:44,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:58:44,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:58:44,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:58:44,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:58:44,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:58:44,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:58:44,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:58:44,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:58:44,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:58:44,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:58:44,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:58:44,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:58:44,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:58:44,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:58:44,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:58:44,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:58:44,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:58:44,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:58:44,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:58:44,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:58:44,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:58:44,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:58:44,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:58:44,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:58:44,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:58:44,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:58:44,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:58:44,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:58:44,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:58:44,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:58:44,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:58:44,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:58:44,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:58:44,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:58:44,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:58:44,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:58:44,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:58:44,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:58:44,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:58:44,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:58:44,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:58:44,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:58:44,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:58:44,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:58:44,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:58:44,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:58:44,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:58:44,937 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:58:44,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:58:44,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:58:44,938 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:58:44,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:58:44,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:58:44,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:58:44,939 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:58:44,939 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:58:44,939 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:58:44,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:58:44,940 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:58:44,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:58:44,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:58:44,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:58:44,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:58:44,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:58:44,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:58:44,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:58:44,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:58:44,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:58:44,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:58:44,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:58:44,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2021-08-27 04:58:45,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:58:45,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:58:45,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:58:45,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:58:45,348 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:58:45,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-08-27 04:58:45,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd0ab97a/1a87b76e018348c6a8de4e9d6ae333e7/FLAGaed2eac15 [2021-08-27 04:58:45,955 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:58:45,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-08-27 04:58:45,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd0ab97a/1a87b76e018348c6a8de4e9d6ae333e7/FLAGaed2eac15 [2021-08-27 04:58:46,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd0ab97a/1a87b76e018348c6a8de4e9d6ae333e7 [2021-08-27 04:58:46,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:58:46,288 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:58:46,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:58:46,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:58:46,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:58:46,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f9850e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46, skipping insertion in model container [2021-08-27 04:58:46,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:58:46,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:58:46,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:58:46,628 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:58:46,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:58:46,698 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:58:46,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46 WrapperNode [2021-08-27 04:58:46,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:58:46,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:58:46,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:58:46,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:58:46,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:58:46,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:58:46,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:58:46,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:58:46,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (1/1) ... [2021-08-27 04:58:46,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:58:46,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:46,777 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 04:58:46,780 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 04:58:46,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:58:46,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:58:46,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:58:46,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:58:46,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:58:46,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:58:46,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:58:46,812 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2021-08-27 04:58:46,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:58:46,812 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:58:46,813 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:58:46,814 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:58:46,815 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:58:46,816 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:58:46,817 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:58:46,817 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:58:46,817 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:58:46,817 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:58:46,817 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:58:46,817 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:58:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:58:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:58:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:58:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:58:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:58:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:58:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:58:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:58:46,824 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:58:46,825 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:58:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:58:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:58:46,828 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:58:46,828 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:58:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:58:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:58:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2021-08-27 04:58:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:58:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:58:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:58:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:58:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:58:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:58:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:58:47,196 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:58:47,196 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 04:58:47,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:58:47 BoogieIcfgContainer [2021-08-27 04:58:47,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:58:47,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:58:47,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:58:47,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:58:47,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:58:46" (1/3) ... [2021-08-27 04:58:47,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5158e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:58:47, skipping insertion in model container [2021-08-27 04:58:47,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:46" (2/3) ... [2021-08-27 04:58:47,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5158e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:58:47, skipping insertion in model container [2021-08-27 04:58:47,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:58:47" (3/3) ... [2021-08-27 04:58:47,205 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2021-08-27 04:58:47,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:58:47,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-27 04:58:47,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:58:47,265 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 04:58:47,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-27 04:58:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 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 04:58:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:47,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:47,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:47,290 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:47,295 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2021-08-27 04:58:47,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:47,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241289308] [2021-08-27 04:58:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:47,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:47,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:47,517 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 04:58:47,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:47,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241289308] [2021-08-27 04:58:47,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241289308] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:47,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:47,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:58:47,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304216488] [2021-08-27 04:58:47,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 04:58:47,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 04:58:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:58:47,545 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 04:58:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:47,619 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-08-27 04:58:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:58:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 04:58:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:47,627 INFO L225 Difference]: With dead ends: 37 [2021-08-27 04:58:47,627 INFO L226 Difference]: Without dead ends: 34 [2021-08-27 04:58:47,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:58:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-27 04:58:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-27 04:58:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 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 04:58:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-08-27 04:58:47,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-08-27 04:58:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:47,665 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-08-27 04:58:47,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 04:58:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-08-27 04:58:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:47,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:47,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:47,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:58:47,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2021-08-27 04:58:47,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:47,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162558245] [2021-08-27 04:58:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:47,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:47,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:47,768 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 04:58:47,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:47,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162558245] [2021-08-27 04:58:47,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162558245] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:47,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:47,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:58:47,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094303783] [2021-08-27 04:58:47,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:58:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:58:47,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:47,775 INFO L87 Difference]: Start difference. First operand 34 states and 38 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 04:58:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:47,861 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-08-27 04:58:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:58:47,862 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 04:58:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:47,864 INFO L225 Difference]: With dead ends: 32 [2021-08-27 04:58:47,865 INFO L226 Difference]: Without dead ends: 32 [2021-08-27 04:58:47,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-27 04:58:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-27 04:58:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 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 04:58:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-27 04:58:47,872 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2021-08-27 04:58:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:47,873 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-27 04:58:47,873 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 04:58:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-27 04:58:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:47,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:47,874 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:47,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:58:47,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr3REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:47,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:47,875 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2021-08-27 04:58:47,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:47,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144658606] [2021-08-27 04:58:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:47,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:47,999 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 04:58:47,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144658606] [2021-08-27 04:58:48,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144658606] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:48,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:48,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:58:48,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463377763] [2021-08-27 04:58:48,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:58:48,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:58:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:58:48,005 INFO L87 Difference]: Start difference. First operand 32 states and 36 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 04:58:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:48,099 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-08-27 04:58:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:58:48,099 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 04:58:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:48,100 INFO L225 Difference]: With dead ends: 31 [2021-08-27 04:58:48,100 INFO L226 Difference]: Without dead ends: 31 [2021-08-27 04:58:48,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:58:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-27 04:58:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-27 04:58:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 states have internal predecessors, (30), 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 04:58:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-27 04:58:48,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2021-08-27 04:58:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:48,105 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-27 04:58:48,105 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 04:58:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-27 04:58:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:48,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:48,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:48,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:58:48,106 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2021-08-27 04:58:48,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:48,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32691302] [2021-08-27 04:58:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,158 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 04:58:48,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32691302] [2021-08-27 04:58:48,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32691302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:48,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:48,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:58:48,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702229731] [2021-08-27 04:58:48,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:58:48,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:58:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:58:48,166 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. 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 04:58:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:48,247 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-08-27 04:58:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:58:48,248 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 04:58:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:48,251 INFO L225 Difference]: With dead ends: 39 [2021-08-27 04:58:48,251 INFO L226 Difference]: Without dead ends: 39 [2021-08-27 04:58:48,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:58:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-27 04:58:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-08-27 04:58:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 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 04:58:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-27 04:58:48,274 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2021-08-27 04:58:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:48,275 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-27 04:58:48,275 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 04:58:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-27 04:58:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:48,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:48,276 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:48,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:58:48,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2021-08-27 04:58:48,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:48,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776623735] [2021-08-27 04:58:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,374 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 04:58:48,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776623735] [2021-08-27 04:58:48,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776623735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:48,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:48,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:58:48,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031986518] [2021-08-27 04:58:48,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:58:48,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:48,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:58:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:58:48,379 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 04:58:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:48,465 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-27 04:58:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 04:58:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:48,466 INFO L225 Difference]: With dead ends: 43 [2021-08-27 04:58:48,466 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 04:58:48,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:58:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 04:58:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-08-27 04:58:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:58:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-27 04:58:48,470 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-08-27 04:58:48,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:48,470 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-27 04:58:48,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 04:58:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-27 04:58:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 04:58:48,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:48,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:48,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:58:48,472 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrnlenErr0REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2021-08-27 04:58:48,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:48,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197622163] [2021-08-27 04:58:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,523 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 04:58:48,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197622163] [2021-08-27 04:58:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197622163] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:48,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:48,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:58:48,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200123134] [2021-08-27 04:58:48,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:58:48,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:58:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:58:48,526 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 04:58:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:48,604 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-08-27 04:58:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2021-08-27 04:58:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:48,608 INFO L225 Difference]: With dead ends: 35 [2021-08-27 04:58:48,608 INFO L226 Difference]: Without dead ends: 35 [2021-08-27 04:58:48,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-27 04:58:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-27 04:58:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 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 04:58:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-27 04:58:48,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2021-08-27 04:58:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:48,612 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-27 04:58:48,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 04:58:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-27 04:58:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 04:58:48,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:48,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:58:48,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2021-08-27 04:58:48,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:48,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142581185] [2021-08-27 04:58:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,704 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 04:58:48,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142581185] [2021-08-27 04:58:48,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142581185] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:48,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:48,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:58:48,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299020065] [2021-08-27 04:58:48,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:58:48,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:58:48,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:48,707 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 04:58:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:48,837 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-08-27 04:58:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:58:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 16 [2021-08-27 04:58:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:48,839 INFO L225 Difference]: With dead ends: 44 [2021-08-27 04:58:48,840 INFO L226 Difference]: Without dead ends: 44 [2021-08-27 04:58:48,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:58:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-27 04:58:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-08-27 04:58:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 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 04:58:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-08-27 04:58:48,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2021-08-27 04:58:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:48,844 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-08-27 04:58:48,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 04:58:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-08-27 04:58:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:58:48,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:48,845 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:48,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:58:48,845 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:48,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2021-08-27 04:58:48,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:48,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863202221] [2021-08-27 04:58:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:48,942 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 04:58:48,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:48,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863202221] [2021-08-27 04:58:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863202221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:48,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857611811] [2021-08-27 04:58:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:48,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:48,945 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 04:58:48,982 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 04:58:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:49,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:58:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:49,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:58:49,310 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 04:58:49,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857611811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:49,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:49,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:58:49,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651075996] [2021-08-27 04:58:49,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:58:49,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:58:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:58:49,312 INFO L87 Difference]: Start difference. First operand 38 states and 45 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 04:58:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:49,438 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-08-27 04:58:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:49,439 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 04:58:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:49,440 INFO L225 Difference]: With dead ends: 44 [2021-08-27 04:58:49,440 INFO L226 Difference]: Without dead ends: 44 [2021-08-27 04:58:49,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-27 04:58:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-08-27 04:58:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 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 04:58:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-27 04:58:49,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-08-27 04:58:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:49,453 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-27 04:58:49,453 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 04:58:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-27 04:58:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:58:49,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:49,454 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:49,474 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 04:58:49,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:49,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2021-08-27 04:58:49,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:49,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465255053] [2021-08-27 04:58:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:49,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:49,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:49,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:49,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465255053] [2021-08-27 04:58:49,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465255053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:49,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:49,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:58:49,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350781463] [2021-08-27 04:58:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:58:49,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:58:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:49,692 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 04:58:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:49,755 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-08-27 04:58:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:58:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2021-08-27 04:58:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:49,757 INFO L225 Difference]: With dead ends: 36 [2021-08-27 04:58:49,757 INFO L226 Difference]: Without dead ends: 36 [2021-08-27 04:58:49,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:58:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-27 04:58:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-27 04:58:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:58:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-27 04:58:49,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-08-27 04:58:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:49,765 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-27 04:58:49,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 04:58:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-27 04:58:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:58:49,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:49,767 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 04:58:49,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:58:49,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2021-08-27 04:58:49,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:49,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060007529] [2021-08-27 04:58:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:49,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:49,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:49,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 04:58:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:49,877 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 04:58:49,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:49,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060007529] [2021-08-27 04:58:49,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060007529] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:49,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:49,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:58:49,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421833900] [2021-08-27 04:58:49,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:58:49,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:58:49,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:58:49,880 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 04:58:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:50,051 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-27 04:58:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:58:50,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-08-27 04:58:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:50,053 INFO L225 Difference]: With dead ends: 58 [2021-08-27 04:58:50,053 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 04:58:50,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:58:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 04:58:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-08-27 04:58:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 04:58:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-08-27 04:58:50,076 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2021-08-27 04:58:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:50,076 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-08-27 04:58:50,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 04:58:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-08-27 04:58:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:58:50,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:50,078 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 04:58:50,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:58:50,078 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2021-08-27 04:58:50,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:50,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592384912] [2021-08-27 04:58:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:50,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:50,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 04:58:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:50,212 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 04:58:50,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:50,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592384912] [2021-08-27 04:58:50,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592384912] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:50,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:50,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:58:50,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27911738] [2021-08-27 04:58:50,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:58:50,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:58:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:50,214 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 04:58:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:50,388 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-08-27 04:58:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:58:50,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-08-27 04:58:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:50,390 INFO L225 Difference]: With dead ends: 55 [2021-08-27 04:58:50,390 INFO L226 Difference]: Without dead ends: 51 [2021-08-27 04:58:50,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:58:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-27 04:58:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-08-27 04:58:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 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 04:58:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-08-27 04:58:50,393 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-08-27 04:58:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-08-27 04:58:50,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 04:58:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-08-27 04:58:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:58:50,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:50,394 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] [2021-08-27 04:58:50,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:58:50,395 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2021-08-27 04:58:50,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:50,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768305479] [2021-08-27 04:58:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:50,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:50,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:50,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:50,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768305479] [2021-08-27 04:58:50,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768305479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:50,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135102434] [2021-08-27 04:58:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:50,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:50,525 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 04:58:50,559 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 04:58:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-27 04:58:50,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:50,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 04:58:50,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:58:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:50,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135102434] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:50,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:58:50,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-08-27 04:58:50,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839100030] [2021-08-27 04:58:50,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:58:50,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:58:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:58:50,837 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:50,947 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-08-27 04:58:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:58:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-08-27 04:58:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:50,949 INFO L225 Difference]: With dead ends: 50 [2021-08-27 04:58:50,949 INFO L226 Difference]: Without dead ends: 50 [2021-08-27 04:58:50,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:58:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-27 04:58:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-08-27 04:58:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:58:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-27 04:58:50,952 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2021-08-27 04:58:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-27 04:58:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-27 04:58:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:58:50,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:50,955 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] [2021-08-27 04:58:50,975 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 04:58:51,160 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,SelfDestructingSolverStorable11 [2021-08-27 04:58:51,161 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1446679015, now seen corresponding path program 1 times [2021-08-27 04:58:51,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:51,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465984951] [2021-08-27 04:58:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:51,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:51,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:51,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:51,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465984951] [2021-08-27 04:58:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465984951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:51,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139699418] [2021-08-27 04:58:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:51,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:51,273 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 04:58:51,315 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 04:58:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 04:58:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:51,565 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 04:58:51,919 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-27 04:58:51,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2021-08-27 04:58:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139699418] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:51,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:58:51,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 15 [2021-08-27 04:58:51,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88943108] [2021-08-27 04:58:51,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:58:51,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:58:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:58:51,956 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:52,171 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-08-27 04:58:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:58:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-08-27 04:58:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:52,172 INFO L225 Difference]: With dead ends: 65 [2021-08-27 04:58:52,172 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 04:58:52,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:58:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 04:58:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-08-27 04:58:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:58:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-08-27 04:58:52,175 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2021-08-27 04:58:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:52,175 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-08-27 04:58:52,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-08-27 04:58:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:58:52,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:52,176 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 04:58:52,200 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 04:58:52,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:52,393 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:52,393 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2021-08-27 04:58:52,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:52,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520400103] [2021-08-27 04:58:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:52,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 04:58:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:52,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:52,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520400103] [2021-08-27 04:58:52,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520400103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:52,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:52,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:58:52,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906699896] [2021-08-27 04:58:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:58:52,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:58:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:58:52,482 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:58:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:52,543 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-08-27 04:58:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:58:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-08-27 04:58:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:52,551 INFO L225 Difference]: With dead ends: 47 [2021-08-27 04:58:52,551 INFO L226 Difference]: Without dead ends: 27 [2021-08-27 04:58:52,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:58:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-27 04:58:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-27 04:58:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 04:58:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-27 04:58:52,553 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-08-27 04:58:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:52,553 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-27 04:58:52,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:58:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-27 04:58:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 04:58:52,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:52,554 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] [2021-08-27 04:58:52,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:58:52,554 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1736404348, now seen corresponding path program 1 times [2021-08-27 04:58:52,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:52,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9776512] [2021-08-27 04:58:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:52,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:52,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:52,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9776512] [2021-08-27 04:58:52,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9776512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:52,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393066739] [2021-08-27 04:58:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:52,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:52,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:52,717 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 04:58:52,719 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 04:58:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:58:52,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:53,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393066739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:53,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:53,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 04:58:53,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324972568] [2021-08-27 04:58:53,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:58:53,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:58:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:58:53,086 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 04:58:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:53,244 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-08-27 04:58:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:58:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 26 [2021-08-27 04:58:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:53,247 INFO L225 Difference]: With dead ends: 39 [2021-08-27 04:58:53,247 INFO L226 Difference]: Without dead ends: 39 [2021-08-27 04:58:53,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:58:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-27 04:58:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-08-27 04:58:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 04:58:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-27 04:58:53,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2021-08-27 04:58:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:53,251 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-27 04:58:53,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 04:58:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-27 04:58:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:58:53,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:53,252 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:53,280 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 04:58:53,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 04:58:53,469 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2115859356, now seen corresponding path program 2 times [2021-08-27 04:58:53,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:53,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348713236] [2021-08-27 04:58:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:53,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:53,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:58:53,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:53,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348713236] [2021-08-27 04:58:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348713236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602382888] [2021-08-27 04:58:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:58:53,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:53,598 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 04:58:53,627 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 04:58:53,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:58:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 04:58:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-27 04:58:54,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:58:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:58:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:54,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602382888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:54,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:54,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2021-08-27 04:58:54,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142367843] [2021-08-27 04:58:54,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:58:54,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:58:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:58:54,672 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 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 04:58:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:55,691 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-08-27 04:58:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:58:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 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 32 [2021-08-27 04:58:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:55,692 INFO L225 Difference]: With dead ends: 59 [2021-08-27 04:58:55,692 INFO L226 Difference]: Without dead ends: 42 [2021-08-27 04:58:55,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 883.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:58:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-27 04:58:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-08-27 04:58:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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 04:58:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-27 04:58:55,695 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2021-08-27 04:58:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:55,695 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-27 04:58:55,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 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 04:58:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-27 04:58:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 04:58:55,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:55,696 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:55,716 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 04:58:55,911 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,SelfDestructingSolverStorable15 [2021-08-27 04:58:55,912 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:55,912 INFO L82 PathProgramCache]: Analyzing trace with hash 942977846, now seen corresponding path program 1 times [2021-08-27 04:58:55,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:55,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207546158] [2021-08-27 04:58:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:55,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:56,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:56,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207546158] [2021-08-27 04:58:56,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207546158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:56,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110283995] [2021-08-27 04:58:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:56,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:56,071 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 04:58:56,071 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 04:58:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:58:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:56,296 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:58:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:56,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110283995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:56,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:56,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-27 04:58:56,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461817374] [2021-08-27 04:58:56,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:58:56,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:58:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:58:56,556 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 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 04:58:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:56,777 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-27 04:58:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:58:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 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 38 [2021-08-27 04:58:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:56,778 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:58:56,779 INFO L226 Difference]: Without dead ends: 46 [2021-08-27 04:58:56,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:58:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-27 04:58:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-08-27 04:58:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 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 04:58:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-08-27 04:58:56,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2021-08-27 04:58:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:56,784 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-08-27 04:58:56,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 16 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 04:58:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-08-27 04:58:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 04:58:56,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:56,789 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:56,819 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 04:58:57,005 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,SelfDestructingSolverStorable16 [2021-08-27 04:58:57,006 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:58:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:57,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 2 times [2021-08-27 04:58:57,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:57,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020716818] [2021-08-27 04:58:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:57,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:57,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:57,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020716818] [2021-08-27 04:58:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020716818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:57,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243612954] [2021-08-27 04:58:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:58:57,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:57,247 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 04:58:57,248 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 04:58:57,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:58:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:58:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:57,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-27 04:58:58,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:58:58,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:58:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243612954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:58,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:58,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-08-27 04:58:58,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21049032] [2021-08-27 04:58:58,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:58:58,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:58:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:58:58,638 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 28 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 04:59:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:00,463 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-08-27 04:59:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:59:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-08-27 04:59:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:00,464 INFO L225 Difference]: With dead ends: 79 [2021-08-27 04:59:00,464 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:59:00,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1284.1ms TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 04:59:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:59:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-08-27 04:59:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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 04:59:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-08-27 04:59:00,467 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2021-08-27 04:59:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-08-27 04:59:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 04:59:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-08-27 04:59:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:59:00,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:00,469 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:00,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 04:59:00,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:00,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 3 times [2021-08-27 04:59:00,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:00,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124746406] [2021-08-27 04:59:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:00,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:01,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:01,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124746406] [2021-08-27 04:59:01,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124746406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:01,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113568753] [2021-08-27 04:59:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:59:01,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:01,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:01,031 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 04:59:01,032 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 04:59:01,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-27 04:59:01,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:59:01,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:01,673 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 04:59:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:59:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113568753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:01,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:01,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-27 04:59:01,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49216225] [2021-08-27 04:59:01,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 04:59:01,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 04:59:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:59:01,967 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 04:59:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:02,563 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-08-27 04:59:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:59:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 52 [2021-08-27 04:59:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:02,564 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:59:02,564 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:59:02,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:59:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:59:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-08-27 04:59:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 04:59:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-08-27 04:59:02,566 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2021-08-27 04:59:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:02,566 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-08-27 04:59:02,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 04:59:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-08-27 04:59:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 04:59:02,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:02,567 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:02,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-27 04:59:02,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:02,773 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:02,773 INFO L82 PathProgramCache]: Analyzing trace with hash -330733851, now seen corresponding path program 4 times [2021-08-27 04:59:02,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:02,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298298803] [2021-08-27 04:59:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:02,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:03,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:03,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298298803] [2021-08-27 04:59:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298298803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:03,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505485803] [2021-08-27 04:59:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:59:03,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:03,065 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 04:59:03,095 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 04:59:03,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:59:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:59:03,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:03,408 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:59:03,648 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 04:59:04,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:59:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-27 04:59:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:04,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505485803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:04,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:04,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-08-27 04:59:04,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129702728] [2021-08-27 04:59:04,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:59:04,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:04,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:59:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:59:04,398 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 28 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 04:59:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:05,281 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-08-27 04:59:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:59:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 56 [2021-08-27 04:59:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:05,282 INFO L225 Difference]: With dead ends: 66 [2021-08-27 04:59:05,282 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 04:59:05,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:59:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 04:59:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-08-27 04:59:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 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 04:59:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-27 04:59:05,285 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2021-08-27 04:59:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:05,285 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-27 04:59:05,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 04:59:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-27 04:59:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 04:59:05,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:05,286 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:05,305 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 04:59:05,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:05,489 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1875657923, now seen corresponding path program 5 times [2021-08-27 04:59:05,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:05,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059482229] [2021-08-27 04:59:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:05,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:05,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:05,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059482229] [2021-08-27 04:59:05,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059482229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:05,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464814004] [2021-08-27 04:59:05,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:59:05,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:05,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:05,817 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 04:59:05,841 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 04:59:06,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-27 04:59:06,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-27 04:59:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:06,491 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 04:59:06,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:59:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:06,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464814004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:06,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:06,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2021-08-27 04:59:06,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360609773] [2021-08-27 04:59:06,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:59:06,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:59:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:59:06,825 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 29 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 04:59:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:07,696 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-08-27 04:59:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:59:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 62 [2021-08-27 04:59:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:07,697 INFO L225 Difference]: With dead ends: 102 [2021-08-27 04:59:07,697 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 04:59:07,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:59:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 04:59:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-08-27 04:59:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 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 04:59:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-08-27 04:59:07,699 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2021-08-27 04:59:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:07,699 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-08-27 04:59:07,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 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 04:59:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-08-27 04:59:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-27 04:59:07,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:07,700 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:07,706 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 04:59:07,900 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,SelfDestructingSolverStorable20 [2021-08-27 04:59:07,901 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:07,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1586034214, now seen corresponding path program 6 times [2021-08-27 04:59:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:07,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670935685] [2021-08-27 04:59:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:07,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:08,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:08,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670935685] [2021-08-27 04:59:08,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670935685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:08,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969395435] [2021-08-27 04:59:08,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:59:08,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:08,214 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 04:59:08,215 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 04:59:08,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-27 04:59:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:59:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:09,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969395435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:09,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:09,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-08-27 04:59:09,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496818187] [2021-08-27 04:59:09,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:59:09,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:59:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:59:09,161 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 29 states have internal predecessors, (120), 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 04:59:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:09,646 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-08-27 04:59:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:59:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 29 states have internal predecessors, (120), 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 66 [2021-08-27 04:59:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:09,647 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:59:09,647 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 04:59:09,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:59:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 04:59:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-08-27 04:59:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 04:59:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-08-27 04:59:09,650 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 66 [2021-08-27 04:59:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:09,650 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-08-27 04:59:09,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 29 states have internal predecessors, (120), 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 04:59:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-08-27 04:59:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-27 04:59:09,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:09,651 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:09,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:09,852 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,SelfDestructingSolverStorable21 [2021-08-27 04:59:09,852 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1098289778, now seen corresponding path program 7 times [2021-08-27 04:59:09,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:09,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346634404] [2021-08-27 04:59:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:09,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:10,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:10,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:10,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346634404] [2021-08-27 04:59:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346634404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:10,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888005485] [2021-08-27 04:59:10,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:59:10,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:10,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:10,217 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 04:59:10,218 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 04:59:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 04:59:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:10,916 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 04:59:11,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:59:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:11,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888005485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:11,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:11,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2021-08-27 04:59:11,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359305078] [2021-08-27 04:59:11,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:59:11,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:59:11,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:59:11,264 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 32 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 04:59:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:12,281 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-08-27 04:59:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:59:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 72 [2021-08-27 04:59:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:12,282 INFO L225 Difference]: With dead ends: 118 [2021-08-27 04:59:12,282 INFO L226 Difference]: Without dead ends: 80 [2021-08-27 04:59:12,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 814.7ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:59:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-27 04:59:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-08-27 04:59:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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 04:59:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-08-27 04:59:12,284 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2021-08-27 04:59:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:12,284 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-08-27 04:59:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 04:59:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-08-27 04:59:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-27 04:59:12,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:12,285 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:12,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-27 04:59:12,496 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,SelfDestructingSolverStorable22 [2021-08-27 04:59:12,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -642645809, now seen corresponding path program 8 times [2021-08-27 04:59:12,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:12,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003170279] [2021-08-27 04:59:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:12,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:12,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:12,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003170279] [2021-08-27 04:59:12,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003170279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:12,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536124788] [2021-08-27 04:59:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:59:12,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:12,828 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 04:59:12,828 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 04:59:13,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:59:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 04:59:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:13,329 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:59:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536124788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:14,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:14,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-27 04:59:14,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026775283] [2021-08-27 04:59:14,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-27 04:59:14,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-27 04:59:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 04:59:14,212 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 34 states, 32 states have (on average 4.3125) internal successors, (138), 31 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:14,867 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-08-27 04:59:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:59:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 4.3125) internal successors, (138), 31 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-08-27 04:59:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:14,868 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:59:14,868 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:59:14,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:59:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:59:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-08-27 04:59:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-08-27 04:59:14,871 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 76 [2021-08-27 04:59:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:14,871 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-08-27 04:59:14,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 4.3125) internal successors, (138), 31 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-08-27 04:59:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-27 04:59:14,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:14,872 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:14,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 04:59:15,076 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,SelfDestructingSolverStorable23 [2021-08-27 04:59:15,077 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-27 04:59:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1015562841, now seen corresponding path program 9 times [2021-08-27 04:59:15,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:15,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147444228] [2021-08-27 04:59:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:15,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:15,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:15,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:15,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147444228] [2021-08-27 04:59:15,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147444228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:15,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119160328] [2021-08-27 04:59:15,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:59:15,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:15,501 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 04:59:15,534 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 04:59:16,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-27 04:59:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 04:59:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:16,106 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:59:16,277 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 04:59:16,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:59:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-27 04:59:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-08-27 04:59:16,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119160328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:16,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 31 [2021-08-27 04:59:16,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606712403] [2021-08-27 04:59:16,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:59:16,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:59:16,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=868, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:59:16,675 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 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 04:59:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:19,573 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-08-27 04:59:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-27 04:59:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 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 82 [2021-08-27 04:59:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:19,574 INFO L225 Difference]: With dead ends: 133 [2021-08-27 04:59:19,574 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:59:19,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2620.8ms TimeCoverageRelationStatistics Valid=683, Invalid=5479, Unknown=0, NotChecked=0, Total=6162 [2021-08-27 04:59:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:59:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:59:19,575 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 04:59:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:59:19,575 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2021-08-27 04:59:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:19,575 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:59:19,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 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 04:59:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:59:19,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:59:19,577 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrnlenErr0REQUIRES_VIOLATION [2021-08-27 04:59:19,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrnlenErr1REQUIRES_VIOLATION [2021-08-27 04:59:19,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:59:19,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:59:19,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:59:19,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:59:19,578 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:59:19,583 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 04:59:19,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:19,782 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:59:19,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:59:19 BoogieIcfgContainer [2021-08-27 04:59:19,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:59:19,784 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:59:19,784 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:59:19,784 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:59:19,785 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:58:47" (3/4) ... [2021-08-27 04:59:19,787 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:59:19,791 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:59:19,791 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:59:19,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2021-08-27 04:59:19,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:59:19,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:59:19,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:59:19,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:59:19,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:59:19,795 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-27 04:59:19,796 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-27 04:59:19,796 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:59:19,796 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:59:19,828 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:59:19,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:59:19,829 INFO L168 Benchmark]: Toolchain (without parser) took 33541.47 ms. Allocated memory was 54.5 MB in the beginning and 327.2 MB in the end (delta: 272.6 MB). Free memory was 30.6 MB in the beginning and 180.8 MB in the end (delta: -150.2 MB). Peak memory consumption was 122.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:59:19,829 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 36.7 MB in the beginning and 36.7 MB in the end (delta: 37.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:59:19,830 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.04 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 44.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:59:19,830 INFO L168 Benchmark]: Boogie Preprocessor took 48.69 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 42.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:59:19,830 INFO L168 Benchmark]: RCFGBuilder took 448.93 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 35.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:59:19,831 INFO L168 Benchmark]: TraceAbstraction took 32584.28 ms. Allocated memory was 67.1 MB in the beginning and 327.2 MB in the end (delta: 260.0 MB). Free memory was 35.0 MB in the beginning and 184.3 MB in the end (delta: -149.3 MB). Peak memory consumption was 109.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:59:19,836 INFO L168 Benchmark]: Witness Printer took 44.33 ms. Allocated memory is still 327.2 MB. Free memory was 184.3 MB in the beginning and 180.8 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:59:19,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 36.7 MB in the beginning and 36.7 MB in the end (delta: 37.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 408.04 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 44.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.69 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 42.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 448.93 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 35.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32584.28 ms. Allocated memory was 67.1 MB in the beginning and 327.2 MB in the end (delta: 260.0 MB). Free memory was 35.0 MB in the beginning and 184.3 MB in the end (delta: -149.3 MB). Peak memory consumption was 109.6 MB. Max. memory is 16.1 GB. * Witness Printer took 44.33 ms. Allocated memory is still 327.2 MB. Free memory was 184.3 MB in the beginning and 180.8 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: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 32525.5ms, OverallIterations: 25, TraceHistogramMax: 8, EmptinessCheckTime: 30.5ms, AutomataDifference: 12284.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 683 SDtfs, 1601 SDslu, 2073 SDs, 0 SdLazy, 10187 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5218.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1115 GetRequests, 581 SyntacticMatches, 6 SemanticMatches, 528 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3022 ImplicationChecksByTransitivity, 10204.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=24, InterpolantAutomatonStates: 316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 134.2ms AutomataMinimizationTime, 25 MinimizatonAttempts, 107 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 158.2ms SsaConstructionTime, 983.9ms SatisfiabilityAnalysisTime, 11960.9ms InterpolantComputationTime, 1498 NumberOfCodeBlocks, 1488 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 1459 ConstructedInterpolants, 57 QuantifiedInterpolants, 11346 SizeOfPredicates, 124 NumberOfNonLiveVariables, 2267 ConjunctsInSsa, 459 ConjunctsInUnsatCore, 39 InterpolantComputations, 13 PerfectInterpolantSequences, 534/1978 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:59:19,872 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 0 Received shutdown request...