./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-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_cstrcmp-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 f68b319d77fa756392ca29e618a1e0accd9b6c9e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 04:55:00,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:55:00,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:55:00,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:55:00,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:55:00,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:55:00,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:55:00,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:55:00,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:55:00,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:55:00,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:55:00,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:55:00,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:55:00,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:55:00,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:55:00,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:55:00,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:55:00,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:55:00,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:55:00,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:55:00,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:55:00,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:55:00,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:55:00,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:55:00,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:55:00,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:55:00,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:55:00,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:55:00,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:55:00,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:55:00,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:55:00,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:55:00,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:55:00,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:55:00,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:55:00,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:55:00,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:55:00,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:55:00,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:55:00,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:55:00,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:55:00,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:55:00,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:55:00,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:55:00,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:55:00,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:55:00,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:55:00,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:55:00,624 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:55:00,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:55:00,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:55:00,625 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:55:00,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:55:00,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:55:00,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:55:00,626 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:55:00,626 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:55:00,626 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:55:00,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:55:00,627 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:55:00,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:55:00,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:55:00,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:55:00,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:55:00,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:55:00,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:55:00,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:55:00,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:55:00,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:55:00,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:55:00,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:55:00,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2021-08-27 04:55:00,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:55:00,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:55:00,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:55:00,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:55:00,927 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:55:00,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-08-27 04:55:00,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aca87626/acd80409bcaf4b52afac43c128a8002e/FLAGba1764fd0 [2021-08-27 04:55:01,404 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:55:01,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-08-27 04:55:01,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aca87626/acd80409bcaf4b52afac43c128a8002e/FLAGba1764fd0 [2021-08-27 04:55:01,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aca87626/acd80409bcaf4b52afac43c128a8002e [2021-08-27 04:55:01,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:55:01,436 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:55:01,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:55:01,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:55:01,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:55:01,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ca2509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01, skipping insertion in model container [2021-08-27 04:55:01,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:55:01,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:55:01,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:55:01,773 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:55:01,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:55:01,844 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:55:01,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01 WrapperNode [2021-08-27 04:55:01,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:55:01,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:55:01,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:55:01,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:55:01,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:55:01,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:55:01,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:55:01,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:55:01,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (1/1) ... [2021-08-27 04:55:01,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:55:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:01,954 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 04:55:01,984 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 04:55:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:55:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:55:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:55:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:55:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:55:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:55:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:55:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2021-08-27 04:55:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:55:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:55:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:55:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:55:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:55:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:55:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:55:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:55:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:55:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:55:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:55:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:55:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:55:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:55:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:55:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:55:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:55:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:55:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:55:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:55:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:55:02,013 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:55:02,013 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:55:02,013 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:55:02,013 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:55:02,013 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:55:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:55:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:55:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:55:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:55:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:55:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:55:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:55:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:55:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:55:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:55:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:55:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:55:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:55:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:55:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:55:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:55:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:55:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:55:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:55:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:55:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:55:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:55:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:55:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:55:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:55:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:55:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:55:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:55:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:55:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:55:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:55:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:55:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:55:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:55:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:55:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:55:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:55:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:55:02,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:55:02,754 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 04:55:02,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:55:02 BoogieIcfgContainer [2021-08-27 04:55:02,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:55:02,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:55:02,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:55:02,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:55:02,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:55:01" (1/3) ... [2021-08-27 04:55:02,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d9448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:55:02, skipping insertion in model container [2021-08-27 04:55:02,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:55:01" (2/3) ... [2021-08-27 04:55:02,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d9448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:55:02, skipping insertion in model container [2021-08-27 04:55:02,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:55:02" (3/3) ... [2021-08-27 04:55:02,767 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2021-08-27 04:55:02,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:55:02,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:55:02,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:55:02,829 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 04:55:02,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:55:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 32 states have (on average 1.875) internal successors, (60), 51 states have internal predecessors, (60), 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 04:55:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:55:02,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:02,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:02,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:02,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash -568922052, now seen corresponding path program 1 times [2021-08-27 04:55:02,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:02,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124184886] [2021-08-27 04:55:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:02,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:03,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:03,119 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 04:55:03,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:03,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124184886] [2021-08-27 04:55:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124184886] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:03,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:03,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:55:03,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388611783] [2021-08-27 04:55:03,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:55:03,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:55:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:55:03,141 INFO L87 Difference]: Start difference. First operand has 58 states, 32 states have (on average 1.875) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 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 04:55:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:03,360 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-08-27 04:55:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:55:03,362 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 04:55:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:03,368 INFO L225 Difference]: With dead ends: 56 [2021-08-27 04:55:03,368 INFO L226 Difference]: Without dead ends: 53 [2021-08-27 04:55:03,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:55:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-27 04:55:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-27 04:55:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 47 states have internal predecessors, (53), 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 04:55:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-08-27 04:55:03,400 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 11 [2021-08-27 04:55:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:03,401 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-08-27 04:55:03,401 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 04:55:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-08-27 04:55:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:55:03,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:03,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:03,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:55:03,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash -568922051, now seen corresponding path program 1 times [2021-08-27 04:55:03,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:03,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881623322] [2021-08-27 04:55:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:03,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:03,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:03,560 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 04:55:03,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:03,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881623322] [2021-08-27 04:55:03,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881623322] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:03,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:03,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:55:03,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292041026] [2021-08-27 04:55:03,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:55:03,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:55:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:55:03,565 INFO L87 Difference]: Start difference. First operand 53 states and 58 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 04:55:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:03,803 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-08-27 04:55:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:55:03,804 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 04:55:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:03,806 INFO L225 Difference]: With dead ends: 73 [2021-08-27 04:55:03,806 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 04:55:03,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:55:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 04:55:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-08-27 04:55:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.696969696969697) internal successors, (56), 49 states have internal predecessors, (56), 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 04:55:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-08-27 04:55:03,815 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2021-08-27 04:55:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:03,815 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-08-27 04:55:03,815 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 04:55:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-08-27 04:55:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:55:03,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:03,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:03,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:55:03,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1273294668, now seen corresponding path program 1 times [2021-08-27 04:55:03,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:03,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16083663] [2021-08-27 04:55:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:03,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:03,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:03,895 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 04:55:03,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:03,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16083663] [2021-08-27 04:55:03,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16083663] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:03,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:03,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:55:03,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055549851] [2021-08-27 04:55:03,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:55:03,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:03,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:55:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:55:03,898 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:04,018 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-27 04:55:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:55:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:55:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:04,022 INFO L225 Difference]: With dead ends: 54 [2021-08-27 04:55:04,022 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 04:55:04,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:55:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 04:55:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-27 04:55:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 48 states have internal predecessors, (55), 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 04:55:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-27 04:55:04,027 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 13 [2021-08-27 04:55:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:04,027 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-27 04:55:04,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-27 04:55:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:55:04,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:04,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:04,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:55:04,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1273294616, now seen corresponding path program 1 times [2021-08-27 04:55:04,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:04,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941636018] [2021-08-27 04:55:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:04,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,100 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 04:55:04,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941636018] [2021-08-27 04:55:04,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941636018] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:04,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:04,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:55:04,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356843541] [2021-08-27 04:55:04,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:55:04,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:55:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:55:04,107 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:04,219 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-08-27 04:55:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:55:04,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:55:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:04,223 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:55:04,224 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:55:04,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:55:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:55:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-08-27 04:55:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:55:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-08-27 04:55:04,242 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 13 [2021-08-27 04:55:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:04,243 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-08-27 04:55:04,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-08-27 04:55:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:55:04,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:04,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:04,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:55:04,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1216036314, now seen corresponding path program 1 times [2021-08-27 04:55:04,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:04,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356377560] [2021-08-27 04:55:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:04,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,298 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 04:55:04,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:04,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356377560] [2021-08-27 04:55:04,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356377560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:04,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:04,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:55:04,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585440536] [2021-08-27 04:55:04,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:55:04,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:55:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:55:04,301 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:04,391 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-08-27 04:55:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:55:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:55:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:04,392 INFO L225 Difference]: With dead ends: 61 [2021-08-27 04:55:04,392 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 04:55:04,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:55:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 04:55:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-27 04:55:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 55 states have internal predecessors, (65), 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 04:55:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-27 04:55:04,396 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-08-27 04:55:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:04,396 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-27 04:55:04,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-27 04:55:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:55:04,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:04,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:04,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:55:04,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1216036313, now seen corresponding path program 1 times [2021-08-27 04:55:04,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:04,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955954963] [2021-08-27 04:55:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:04,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,509 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 04:55:04,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:04,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955954963] [2021-08-27 04:55:04,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955954963] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:04,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:04,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:55:04,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915461086] [2021-08-27 04:55:04,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:55:04,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:55:04,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:55:04,512 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:04,648 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-08-27 04:55:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:55:04,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:55:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:04,650 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:55:04,650 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:55:04,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:55:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:55:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-08-27 04:55:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:55:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-08-27 04:55:04,654 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 13 [2021-08-27 04:55:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:04,655 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-08-27 04:55:04,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-08-27 04:55:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:55:04,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:04,656 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:04,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:55:04,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash -817429008, now seen corresponding path program 1 times [2021-08-27 04:55:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:04,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210064440] [2021-08-27 04:55:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:04,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,709 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 04:55:04,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:04,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210064440] [2021-08-27 04:55:04,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210064440] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:04,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:04,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:55:04,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162011564] [2021-08-27 04:55:04,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:55:04,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:55:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:55:04,711 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:04,814 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-08-27 04:55:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:55:04,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 04:55:04,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:04,815 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:55:04,815 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:55:04,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:55:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:55:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:55:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:55:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-27 04:55:04,818 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 14 [2021-08-27 04:55:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:04,818 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-27 04:55:04,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-27 04:55:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:55:04,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:04,819 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:04,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:55:04,819 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash 478071552, now seen corresponding path program 1 times [2021-08-27 04:55:04,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:04,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315852725] [2021-08-27 04:55:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:04,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:04,897 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 04:55:04,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:04,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315852725] [2021-08-27 04:55:04,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315852725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:04,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435812806] [2021-08-27 04:55:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:04,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:04,900 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 04:55:04,938 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 04:55:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:55:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:05,152 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:55:05,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:55:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-27 04:55:05,343 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 04:55:05,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435812806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:05,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:05,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:55:05,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231457378] [2021-08-27 04:55:05,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:55:05,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:55:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:55:05,346 INFO L87 Difference]: Start difference. First operand 62 states and 72 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 04:55:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:05,505 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-27 04:55:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:55:05,506 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 04:55:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:05,506 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:55:05,506 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:55:05,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:55:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:55:05,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-08-27 04:55:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.475) internal successors, (59), 51 states have internal predecessors, (59), 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 04:55:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-08-27 04:55:05,510 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 15 [2021-08-27 04:55:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:05,510 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-08-27 04:55:05,510 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 04:55:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-08-27 04:55:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:55:05,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:05,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:05,543 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 04:55:05,728 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 04:55:05,729 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrcmpErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 437037254, now seen corresponding path program 1 times [2021-08-27 04:55:05,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:05,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467704315] [2021-08-27 04:55:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:05,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:05,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:05,797 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 04:55:05,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:05,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467704315] [2021-08-27 04:55:05,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467704315] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:05,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:05,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:55:05,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163499537] [2021-08-27 04:55:05,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:55:05,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:55:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:55:05,803 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 04:55:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:05,910 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-27 04:55:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:55:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-08-27 04:55:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:05,911 INFO L225 Difference]: With dead ends: 55 [2021-08-27 04:55:05,911 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 04:55:05,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:55:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 04:55:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-27 04:55:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 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 04:55:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-27 04:55:05,915 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-08-27 04:55:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:05,915 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-27 04:55:05,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 04:55:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-27 04:55:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:55:05,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:05,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:05,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:55:05,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 437037255, now seen corresponding path program 1 times [2021-08-27 04:55:05,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:05,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424142758] [2021-08-27 04:55:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:05,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:05,998 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 04:55:05,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:05,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424142758] [2021-08-27 04:55:05,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424142758] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:05,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:05,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:55:05,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769737028] [2021-08-27 04:55:06,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:55:06,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:55:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:55:06,001 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 04:55:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:06,204 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-08-27 04:55:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:55:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2021-08-27 04:55:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:06,207 INFO L225 Difference]: With dead ends: 69 [2021-08-27 04:55:06,207 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 04:55:06,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:55:06,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 04:55:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-08-27 04:55:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 54 states have internal predecessors, (65), 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 04:55:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-08-27 04:55:06,210 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 17 [2021-08-27 04:55:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:06,210 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-08-27 04:55:06,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 04:55:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-08-27 04:55:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:55:06,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:06,211 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:06,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:55:06,212 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash 92671082, now seen corresponding path program 1 times [2021-08-27 04:55:06,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:06,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722331566] [2021-08-27 04:55:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:06,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:06,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:06,293 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 04:55:06,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:06,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722331566] [2021-08-27 04:55:06,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722331566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:06,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506929077] [2021-08-27 04:55:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:06,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:06,295 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 04:55:06,322 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 04:55:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:55:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:06,497 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:55:06,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:55:06,614 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 04:55:06,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506929077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:06,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:06,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:55:06,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616863613] [2021-08-27 04:55:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:55:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:55:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:55:06,616 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:06,805 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-08-27 04:55:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:55:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:55:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:06,807 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:55:06,807 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:55:06,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:55:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:55:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-08-27 04:55:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 51 states have internal predecessors, (61), 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 04:55:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-08-27 04:55:06,815 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 17 [2021-08-27 04:55:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:06,815 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-08-27 04:55:06,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-08-27 04:55:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:55:06,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:06,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:06,838 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 04:55:07,032 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,SelfDestructingSolverStorable10 [2021-08-27 04:55:07,033 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrcmpErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash -913994489, now seen corresponding path program 1 times [2021-08-27 04:55:07,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:07,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086716796] [2021-08-27 04:55:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:07,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,095 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 04:55:07,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:07,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086716796] [2021-08-27 04:55:07,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086716796] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:07,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:07,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:55:07,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358136165] [2021-08-27 04:55:07,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:55:07,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:07,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:55:07,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:55:07,097 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:07,225 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-08-27 04:55:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:55:07,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 04:55:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:07,226 INFO L225 Difference]: With dead ends: 56 [2021-08-27 04:55:07,226 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 04:55:07,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:55:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 04:55:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-27 04:55:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.372093023255814) internal successors, (59), 50 states have internal predecessors, (59), 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 04:55:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-08-27 04:55:07,228 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 19 [2021-08-27 04:55:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:07,229 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-08-27 04:55:07,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-08-27 04:55:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:55:07,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:07,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:07,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 04:55:07,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash -913994488, now seen corresponding path program 1 times [2021-08-27 04:55:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:07,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123243671] [2021-08-27 04:55:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:07,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,324 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 04:55:07,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:07,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123243671] [2021-08-27 04:55:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123243671] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:07,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:55:07,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706248798] [2021-08-27 04:55:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:55:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:55:07,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:55:07,325 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:07,515 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-08-27 04:55:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:55:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 04:55:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:07,515 INFO L225 Difference]: With dead ends: 56 [2021-08-27 04:55:07,515 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 04:55:07,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:55:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 04:55:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-27 04:55:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 50 states have internal predecessors, (58), 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 04:55:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-27 04:55:07,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2021-08-27 04:55:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:07,518 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-27 04:55:07,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-27 04:55:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:55:07,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:07,518 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 04:55:07,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:55:07,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcmpErr4REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2119591432, now seen corresponding path program 1 times [2021-08-27 04:55:07,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:07,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890609067] [2021-08-27 04:55:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:07,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,566 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 04:55:07,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:07,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890609067] [2021-08-27 04:55:07,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890609067] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:07,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:07,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:55:07,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124338156] [2021-08-27 04:55:07,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:55:07,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:55:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:55:07,567 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:07,707 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-27 04:55:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:55:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:55:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:07,709 INFO L225 Difference]: With dead ends: 55 [2021-08-27 04:55:07,709 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 04:55:07,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:55:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 04:55:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-27 04:55:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 49 states have internal predecessors, (57), 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 04:55:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-27 04:55:07,711 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 21 [2021-08-27 04:55:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:07,711 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-27 04:55:07,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-27 04:55:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:55:07,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:07,712 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 04:55:07,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:55:07,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2119591433, now seen corresponding path program 1 times [2021-08-27 04:55:07,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:07,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542110795] [2021-08-27 04:55:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:07,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:07,779 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 04:55:07,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:07,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542110795] [2021-08-27 04:55:07,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542110795] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:07,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:07,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:55:07,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146724058] [2021-08-27 04:55:07,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:55:07,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:55:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:55:07,781 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:07,930 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-08-27 04:55:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:55:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:55:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:07,931 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:55:07,931 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:55:07,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:55:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:55:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-08-27 04:55:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 50 states have internal predecessors, (58), 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 04:55:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-27 04:55:07,933 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 21 [2021-08-27 04:55:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:07,933 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-27 04:55:07,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-27 04:55:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:55:07,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:07,934 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 04:55:07,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:55:07,934 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcmpErr8REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1112818005, now seen corresponding path program 1 times [2021-08-27 04:55:07,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:07,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686938654] [2021-08-27 04:55:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:07,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:08,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:55:08,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:08,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686938654] [2021-08-27 04:55:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686938654] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:08,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:08,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:55:08,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667286573] [2021-08-27 04:55:08,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:55:08,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:55:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:55:08,006 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:08,140 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-27 04:55:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:55:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-27 04:55:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:08,142 INFO L225 Difference]: With dead ends: 55 [2021-08-27 04:55:08,142 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 04:55:08,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:55:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 04:55:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-27 04:55:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 49 states have internal predecessors, (57), 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 04:55:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-27 04:55:08,144 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 23 [2021-08-27 04:55:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:08,145 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-27 04:55:08,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-27 04:55:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:55:08,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:08,147 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 04:55:08,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:55:08,148 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:08,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1112818006, now seen corresponding path program 1 times [2021-08-27 04:55:08,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:08,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320185757] [2021-08-27 04:55:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:08,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:08,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:08,278 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 04:55:08,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:08,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320185757] [2021-08-27 04:55:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320185757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:08,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:08,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:55:08,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550441836] [2021-08-27 04:55:08,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:55:08,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:55:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:55:08,280 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:08,543 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-08-27 04:55:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:55:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-27 04:55:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:08,544 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:55:08,544 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:55:08,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:55:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:55:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-08-27 04:55:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 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 04:55:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-08-27 04:55:08,547 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 23 [2021-08-27 04:55:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:08,547 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-08-27 04:55:08,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-08-27 04:55:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:55:08,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:08,547 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 04:55:08,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:55:08,548 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1112867735, now seen corresponding path program 1 times [2021-08-27 04:55:08,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:08,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750530881] [2021-08-27 04:55:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:08,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:55:08,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:08,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750530881] [2021-08-27 04:55:08,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750530881] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:08,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:08,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:55:08,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630145044] [2021-08-27 04:55:08,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:55:08,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:08,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:55:08,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:55:08,732 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:08,992 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-08-27 04:55:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:55:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-27 04:55:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:08,993 INFO L225 Difference]: With dead ends: 93 [2021-08-27 04:55:08,993 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 04:55:08,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:55:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 04:55:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-08-27 04:55:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 75 states have internal predecessors, (86), 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 04:55:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-08-27 04:55:08,996 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 23 [2021-08-27 04:55:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:08,996 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-08-27 04:55:08,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-08-27 04:55:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 04:55:08,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:08,997 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:08,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:55:08,997 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash 590156061, now seen corresponding path program 1 times [2021-08-27 04:55:08,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:08,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854432855] [2021-08-27 04:55:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:08,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:09,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:09,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:55:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:09,045 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 04:55:09,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:09,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854432855] [2021-08-27 04:55:09,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854432855] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:09,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:09,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:55:09,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734712975] [2021-08-27 04:55:09,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:55:09,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:55:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:55:09,047 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 04:55:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:09,096 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-27 04:55:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:55:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 26 [2021-08-27 04:55:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:09,097 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:55:09,097 INFO L226 Difference]: Without dead ends: 50 [2021-08-27 04:55:09,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:55:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-27 04:55:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-27 04:55:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-08-27 04:55:09,100 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26 [2021-08-27 04:55:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:09,100 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-08-27 04:55:09,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 04:55:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-08-27 04:55:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:55:09,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:09,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:09,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:55:09,101 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1603523034, now seen corresponding path program 1 times [2021-08-27 04:55:09,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:09,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952570226] [2021-08-27 04:55:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:09,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:09,248 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 04:55:09,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:09,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952570226] [2021-08-27 04:55:09,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952570226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:09,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362757751] [2021-08-27 04:55:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:09,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:09,253 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 04:55:09,274 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 04:55:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 04:55:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:09,458 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:55:09,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:55:09,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-27 04:55:09,736 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 04:55:09,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362757751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:09,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:09,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-08-27 04:55:09,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871705995] [2021-08-27 04:55:09,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 04:55:09,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 04:55:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:55:09,738 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 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 04:55:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:10,088 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-08-27 04:55:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:55:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 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 27 [2021-08-27 04:55:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:10,089 INFO L225 Difference]: With dead ends: 66 [2021-08-27 04:55:10,089 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 04:55:10,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:55:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 04:55:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-08-27 04:55:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-27 04:55:10,091 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2021-08-27 04:55:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-27 04:55:10,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 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 04:55:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-27 04:55:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 04:55:10,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:10,092 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:10,116 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 04:55:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:10,293 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -907625125, now seen corresponding path program 1 times [2021-08-27 04:55:10,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:10,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227038365] [2021-08-27 04:55:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:10,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:10,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:10,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227038365] [2021-08-27 04:55:10,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227038365] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:10,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:10,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 04:55:10,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470665993] [2021-08-27 04:55:10,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:55:10,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:55:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:55:10,481 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 04:55:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:10,792 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-08-27 04:55:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:55:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 29 [2021-08-27 04:55:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:10,793 INFO L225 Difference]: With dead ends: 66 [2021-08-27 04:55:10,793 INFO L226 Difference]: Without dead ends: 48 [2021-08-27 04:55:10,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:55:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-27 04:55:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-27 04:55:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 43 states have internal predecessors, (49), 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 04:55:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-08-27 04:55:10,795 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2021-08-27 04:55:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:10,795 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-08-27 04:55:10,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 04:55:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-08-27 04:55:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 04:55:10,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:10,796 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:10,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 04:55:10,796 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash -688770407, now seen corresponding path program 1 times [2021-08-27 04:55:10,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:10,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010699809] [2021-08-27 04:55:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:10,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:11,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:11,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:11,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010699809] [2021-08-27 04:55:11,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010699809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:11,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:55:11,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 04:55:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448866668] [2021-08-27 04:55:11,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 04:55:11,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 04:55:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:55:11,017 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 04:55:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:11,326 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-08-27 04:55:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:55:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 29 [2021-08-27 04:55:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:11,327 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:55:11,327 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 04:55:11,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:55:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 04:55:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-08-27 04:55:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.25) internal successors, (50), 44 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 04:55:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-08-27 04:55:11,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2021-08-27 04:55:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:11,330 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-08-27 04:55:11,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 04:55:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-08-27 04:55:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:55:11,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:11,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:11,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-27 04:55:11,331 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash -196593956, now seen corresponding path program 1 times [2021-08-27 04:55:11,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:11,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042804841] [2021-08-27 04:55:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:11,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:11,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:11,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:11,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042804841] [2021-08-27 04:55:11,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042804841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:11,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8813280] [2021-08-27 04:55:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:11,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:11,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:11,512 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 04:55:11,512 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 04:55:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:55:11,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:12,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8813280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:12,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:12,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-27 04:55:12,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766014755] [2021-08-27 04:55:12,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:55:12,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:55:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:55:12,025 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 19 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 04:55:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:12,354 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-08-27 04:55:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:55:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 33 [2021-08-27 04:55:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:12,355 INFO L225 Difference]: With dead ends: 52 [2021-08-27 04:55:12,355 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 04:55:12,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:55:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 04:55:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-08-27 04:55:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 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 04:55:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-27 04:55:12,358 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 33 [2021-08-27 04:55:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:12,358 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-27 04:55:12,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 04:55:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-27 04:55:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:55:12,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:12,359 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:12,385 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 04:55:12,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:12,574 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:12,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:12,574 INFO L82 PathProgramCache]: Analyzing trace with hash 51768029, now seen corresponding path program 1 times [2021-08-27 04:55:12,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:12,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989603872] [2021-08-27 04:55:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:12,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:12,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:12,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:12,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989603872] [2021-08-27 04:55:12,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989603872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:12,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934033897] [2021-08-27 04:55:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:12,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:12,759 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 04:55:12,760 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 04:55:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:55:12,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:13,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934033897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:13,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:13,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-27 04:55:13,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433275300] [2021-08-27 04:55:13,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:55:13,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:55:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:55:13,212 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 04:55:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:13,547 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-08-27 04:55:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:55:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-27 04:55:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:13,548 INFO L225 Difference]: With dead ends: 57 [2021-08-27 04:55:13,548 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 04:55:13,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:55:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 04:55:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-08-27 04:55:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 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 04:55:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-08-27 04:55:13,549 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2021-08-27 04:55:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:13,550 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-08-27 04:55:13,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 04:55:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-08-27 04:55:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:55:13,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:13,550 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:13,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 04:55:13,750 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,SelfDestructingSolverStorable23 [2021-08-27 04:55:13,751 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1790582486, now seen corresponding path program 1 times [2021-08-27 04:55:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:13,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173785088] [2021-08-27 04:55:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:13,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:13,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:13,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173785088] [2021-08-27 04:55:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173785088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517006050] [2021-08-27 04:55:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:13,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:13,941 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 04:55:13,973 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 04:55:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-27 04:55:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517006050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:14,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:14,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-08-27 04:55:14,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272917098] [2021-08-27 04:55:14,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:55:14,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:55:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:55:14,445 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 04:55:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:14,814 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-08-27 04:55:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:55:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:55:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:14,817 INFO L225 Difference]: With dead ends: 59 [2021-08-27 04:55:14,817 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 04:55:14,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:55:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 04:55:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-08-27 04:55:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.2) internal successors, (48), 44 states have internal predecessors, (48), 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 04:55:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-08-27 04:55:14,825 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 37 [2021-08-27 04:55:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:14,826 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-08-27 04:55:14,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 04:55:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-08-27 04:55:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:55:14,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:14,827 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:14,847 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 04:55:15,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:15,048 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:15,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:15,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1790532757, now seen corresponding path program 1 times [2021-08-27 04:55:15,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:15,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969491195] [2021-08-27 04:55:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:15,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:15,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:15,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969491195] [2021-08-27 04:55:15,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969491195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:15,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122331736] [2021-08-27 04:55:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:15,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:15,325 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 04:55:15,326 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 04:55:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-27 04:55:15,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:15,770 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 04:55:16,378 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-27 04:55:16,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-08-27 04:55:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:55:16,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122331736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:16,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:16,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-08-27 04:55:16,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316462801] [2021-08-27 04:55:16,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:55:16,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:16,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:55:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:55:16,385 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 25 states have internal predecessors, (60), 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 04:55:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:17,752 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-08-27 04:55:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-27 04:55:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:55:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:17,754 INFO L225 Difference]: With dead ends: 124 [2021-08-27 04:55:17,754 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:55:17,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1338.2ms TimeCoverageRelationStatistics Valid=375, Invalid=3407, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 04:55:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:55:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-08-27 04:55:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 52 states have internal predecessors, (56), 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 04:55:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-27 04:55:17,757 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2021-08-27 04:55:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:17,757 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-27 04:55:17,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 25 states have internal predecessors, (60), 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 04:55:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-27 04:55:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:55:17,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:17,758 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:17,775 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 04:55:17,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:17,961 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1666823887, now seen corresponding path program 2 times [2021-08-27 04:55:17,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:17,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660097243] [2021-08-27 04:55:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:17,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:18,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660097243] [2021-08-27 04:55:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660097243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216299986] [2021-08-27 04:55:18,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:55:18,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:18,177 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 04:55:18,200 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 04:55:18,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:55:18,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 04:55:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216299986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:18,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-27 04:55:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339511761] [2021-08-27 04:55:18,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:55:18,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:55:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:55:18,735 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:19,244 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-08-27 04:55:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:55:19,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-08-27 04:55:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:19,245 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:55:19,245 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:55:19,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:55:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:55:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-08-27 04:55:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 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 04:55:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-08-27 04:55:19,249 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 45 [2021-08-27 04:55:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:19,249 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-08-27 04:55:19,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-08-27 04:55:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 04:55:19,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:19,250 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:19,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:55:19,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:55:19,470 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash 205044466, now seen corresponding path program 2 times [2021-08-27 04:55:19,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:19,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082620135] [2021-08-27 04:55:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:19,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:19,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:19,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:19,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082620135] [2021-08-27 04:55:19,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082620135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:19,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649085260] [2021-08-27 04:55:19,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:55:19,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:19,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:19,665 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 04:55:19,695 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 04:55:19,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:55:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 04:55:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:20,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649085260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:20,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:20,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-27 04:55:20,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952344635] [2021-08-27 04:55:20,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 04:55:20,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 04:55:20,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:55:20,282 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 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 04:55:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:20,774 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-08-27 04:55:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:55:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 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 47 [2021-08-27 04:55:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:20,775 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:55:20,776 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:55:20,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:55:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:55:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-27 04:55:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 58 states have internal predecessors, (63), 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 04:55:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-08-27 04:55:20,778 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 47 [2021-08-27 04:55:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:20,778 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-08-27 04:55:20,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 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 04:55:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-08-27 04:55:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:55:20,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:20,779 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:20,804 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 04:55:20,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:55:20,993 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash -520765069, now seen corresponding path program 2 times [2021-08-27 04:55:20,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:20,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056012269] [2021-08-27 04:55:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:20,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:21,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:21,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:21,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056012269] [2021-08-27 04:55:21,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056012269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:21,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201064868] [2021-08-27 04:55:21,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:55:21,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:21,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:21,205 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 04:55:21,225 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 04:55:21,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 04:55:21,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 04:55:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-27 04:55:21,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201064868] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:21,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:55:21,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2021-08-27 04:55:21,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244773] [2021-08-27 04:55:21,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:55:21,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:55:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:55:21,643 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:21,663 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-08-27 04:55:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:55:21,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-08-27 04:55:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:21,664 INFO L225 Difference]: With dead ends: 61 [2021-08-27 04:55:21,664 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 04:55:21,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:55:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 04:55:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-08-27 04:55:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 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 04:55:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-27 04:55:21,666 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2021-08-27 04:55:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-27 04:55:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-27 04:55:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:55:21,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:21,667 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:21,685 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 04:55:21,872 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,SelfDestructingSolverStorable28 [2021-08-27 04:55:21,873 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2055891520, now seen corresponding path program 2 times [2021-08-27 04:55:21,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:21,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771352162] [2021-08-27 04:55:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:21,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:22,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:22,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771352162] [2021-08-27 04:55:22,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771352162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:22,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389071509] [2021-08-27 04:55:22,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:55:22,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:22,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:22,129 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 04:55:22,157 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 04:55:22,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 04:55:22,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:55:22,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 04:55:22,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389071509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:55:22,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:55:22,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2021-08-27 04:55:22,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544030020] [2021-08-27 04:55:22,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:55:22,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:55:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:55:22,639 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:22,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:22,676 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-08-27 04:55:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:55:22,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:55:22,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:22,676 INFO L225 Difference]: With dead ends: 58 [2021-08-27 04:55:22,676 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 04:55:22,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:55:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 04:55:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-27 04:55:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-08-27 04:55:22,678 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2021-08-27 04:55:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:22,679 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-08-27 04:55:22,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-08-27 04:55:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:55:22,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:22,679 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:22,698 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 04:55:22,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:22,880 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2055941249, now seen corresponding path program 3 times [2021-08-27 04:55:22,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:22,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193202021] [2021-08-27 04:55:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:22,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:23,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:23,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193202021] [2021-08-27 04:55:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193202021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:23,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701704456] [2021-08-27 04:55:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:55:23,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:23,136 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 04:55:23,136 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 04:55:23,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:55:23,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-27 04:55:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:55:23,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:55:23,849 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:55:23,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:55:24,606 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:55:24,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:55:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:24,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701704456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:24,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:24,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-27 04:55:24,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939123816] [2021-08-27 04:55:24,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:55:24,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:55:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:55:24,616 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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 04:55:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:45,496 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-08-27 04:55:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:55:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:55:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:45,497 INFO L225 Difference]: With dead ends: 94 [2021-08-27 04:55:45,497 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:55:45,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 20952.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:55:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:55:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-08-27 04:55:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 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 04:55:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-27 04:55:45,500 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2021-08-27 04:55:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:45,500 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-27 04:55:45,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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 04:55:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-27 04:55:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:55:45,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:45,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:45,520 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 04:55:45,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:45,709 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1984837956, now seen corresponding path program 4 times [2021-08-27 04:55:45,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:45,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114588361] [2021-08-27 04:55:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:45,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:45,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:55:45,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:45,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114588361] [2021-08-27 04:55:45,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114588361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:45,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606233968] [2021-08-27 04:55:45,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:55:45,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:45,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:45,956 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 04:55:45,957 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 04:55:46,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:55:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-27 04:55:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:46,428 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:55:46,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:55:46,840 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 04:55:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-27 04:55:47,595 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-27 04:55:47,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-08-27 04:55:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:55:47,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606233968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:47,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:47,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 33 [2021-08-27 04:55:47,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829050626] [2021-08-27 04:55:47,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:55:47,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:55:47,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:55:47,635 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 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 04:55:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:49,295 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2021-08-27 04:55:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 04:55:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 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 55 [2021-08-27 04:55:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:49,296 INFO L225 Difference]: With dead ends: 96 [2021-08-27 04:55:49,296 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:55:49,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1675.2ms TimeCoverageRelationStatistics Valid=388, Invalid=3644, Unknown=0, NotChecked=0, Total=4032 [2021-08-27 04:55:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:55:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-08-27 04:55:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-08-27 04:55:49,299 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 55 [2021-08-27 04:55:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:49,299 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-08-27 04:55:49,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 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 04:55:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-08-27 04:55:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:55:49,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:49,300 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:49,319 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 04:55:49,505 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,SelfDestructingSolverStorable31 [2021-08-27 04:55:49,505 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1240269832, now seen corresponding path program 3 times [2021-08-27 04:55:49,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:49,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402589526] [2021-08-27 04:55:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:49,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:49,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:55:49,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:49,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402589526] [2021-08-27 04:55:49,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402589526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:49,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318275301] [2021-08-27 04:55:49,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:55:49,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:49,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:49,737 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 04:55:49,741 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 04:55:50,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:55:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:55:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:50,274 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:55:50,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:55:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:55:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318275301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:50,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:50,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-08-27 04:55:50,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571692268] [2021-08-27 04:55:50,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:55:50,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:55:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:55:50,853 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:51,447 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-08-27 04:55:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:55:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-08-27 04:55:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:51,447 INFO L225 Difference]: With dead ends: 70 [2021-08-27 04:55:51,447 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 04:55:51,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 594.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:55:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 04:55:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-08-27 04:55:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-08-27 04:55:51,449 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-08-27 04:55:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:51,450 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-08-27 04:55:51,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-08-27 04:55:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-27 04:55:51,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:55:51,450 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:55:51,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-27 04:55:51,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:51,657 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:55:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:55:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1003947369, now seen corresponding path program 5 times [2021-08-27 04:55:51,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:55:51,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853448645] [2021-08-27 04:55:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:55:51,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:55:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:55:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:55:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:55:51,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:55:51,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853448645] [2021-08-27 04:55:51,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853448645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:51,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945660208] [2021-08-27 04:55:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:55:51,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:55:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:55:51,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:55:51,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:55:52,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:55:52,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:55:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-27 04:55:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:55:52,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:55:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-27 04:55:53,014 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:55:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-27 04:55:54,565 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-08-27 04:55:54,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 34 [2021-08-27 04:55:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 39 refuted. 10 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:55:54,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945660208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:55:54,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:55:54,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-08-27 04:55:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54265278] [2021-08-27 04:55:54,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:55:54,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:55:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:55:54,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=914, Unknown=2, NotChecked=0, Total=992 [2021-08-27 04:55:54,714 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 29 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:25,132 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-08-27 04:56:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:56:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 29 states have internal predecessors, (102), 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 65 [2021-08-27 04:56:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:25,133 INFO L225 Difference]: With dead ends: 126 [2021-08-27 04:56:25,133 INFO L226 Difference]: Without dead ends: 84 [2021-08-27 04:56:25,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 22146.3ms TimeCoverageRelationStatistics Valid=265, Invalid=2812, Unknown=3, NotChecked=0, Total=3080 [2021-08-27 04:56:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-27 04:56:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2021-08-27 04:56:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-08-27 04:56:25,136 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 65 [2021-08-27 04:56:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:25,136 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-08-27 04:56:25,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 29 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-08-27 04:56:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-27 04:56:25,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:25,137 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:25,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:25,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:25,349 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:56:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash -614215269, now seen corresponding path program 4 times [2021-08-27 04:56:25,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:25,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820812482] [2021-08-27 04:56:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:25,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:25,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:25,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:25,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820812482] [2021-08-27 04:56:25,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820812482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:25,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481490930] [2021-08-27 04:56:25,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:56:25,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:25,946 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:25,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:56:26,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:56:26,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:26,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-27 04:56:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:26,612 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:56:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:56:27,210 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 04:56:27,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-27 04:56:27,934 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-27 04:56:27,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-08-27 04:56:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:56:27,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481490930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:27,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:27,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 43 [2021-08-27 04:56:27,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44945379] [2021-08-27 04:56:27,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:56:27,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:56:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:56:27,945 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:29,832 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-08-27 04:56:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 04:56:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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 71 [2021-08-27 04:56:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:29,833 INFO L225 Difference]: With dead ends: 115 [2021-08-27 04:56:29,833 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 04:56:29,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1892.5ms TimeCoverageRelationStatistics Valid=413, Invalid=4557, Unknown=0, NotChecked=0, Total=4970 [2021-08-27 04:56:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 04:56:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-08-27 04:56:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-08-27 04:56:29,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 71 [2021-08-27 04:56:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:29,836 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-08-27 04:56:29,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-08-27 04:56:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-27 04:56:29,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:29,837 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:29,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:30,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-27 04:56:30,041 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:56:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash 746041886, now seen corresponding path program 5 times [2021-08-27 04:56:30,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:30,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593443804] [2021-08-27 04:56:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:30,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:30,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:56:30,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:30,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593443804] [2021-08-27 04:56:30,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593443804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:30,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512902915] [2021-08-27 04:56:30,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:56:30,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:30,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:30,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:30,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:56:31,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:56:31,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-27 04:56:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:31,268 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:56:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:56:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:56:32,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512902915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:32,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:32,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-08-27 04:56:32,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859882934] [2021-08-27 04:56:32,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:56:32,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:56:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:56:32,108 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 32 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:32,706 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-08-27 04:56:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:56:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-08-27 04:56:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:32,707 INFO L225 Difference]: With dead ends: 84 [2021-08-27 04:56:32,707 INFO L226 Difference]: Without dead ends: 84 [2021-08-27 04:56:32,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:56:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-27 04:56:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-08-27 04:56:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-08-27 04:56:32,709 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 75 [2021-08-27 04:56:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-08-27 04:56:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-08-27 04:56:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-27 04:56:32,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:32,710 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:32,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:32,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:32,917 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:56:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash -421352019, now seen corresponding path program 6 times [2021-08-27 04:56:32,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:32,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188958575] [2021-08-27 04:56:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:32,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:56:33,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:33,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188958575] [2021-08-27 04:56:33,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188958575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:33,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065843173] [2021-08-27 04:56:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:56:33,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:33,323 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:33,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:56:34,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-27 04:56:34,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:34,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:56:34,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:34,258 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:56:34,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:56:34,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:56:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 04:56:34,834 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:56:34,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-27 04:56:35,752 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-08-27 04:56:35,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 32 [2021-08-27 04:56:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-08-27 04:56:35,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065843173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:35,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:35,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 28 [2021-08-27 04:56:35,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359033664] [2021-08-27 04:56:35,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:56:35,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:35,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:56:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:56:35,833 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 25 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:50,362 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2021-08-27 04:56:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 04:56:50,362 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 25 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-08-27 04:56:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:50,363 INFO L225 Difference]: With dead ends: 141 [2021-08-27 04:56:50,363 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 04:56:50,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 14273.1ms TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 04:56:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 04:56:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-08-27 04:56:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-08-27 04:56:50,366 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2021-08-27 04:56:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:50,366 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-08-27 04:56:50,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 25 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-08-27 04:56:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-27 04:56:50,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:50,367 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:50,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-27 04:56:50,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:50,592 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:56:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash -735803919, now seen corresponding path program 6 times [2021-08-27 04:56:50,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:50,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859211034] [2021-08-27 04:56:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:50,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:51,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:51,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:51,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859211034] [2021-08-27 04:56:51,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859211034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:51,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456772062] [2021-08-27 04:56:51,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:56:51,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:51,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:51,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:56:52,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-27 04:56:52,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-27 04:56:52,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:52,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:56:53,004 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 04:56:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:56:53,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456772062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:53,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:53,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21] total 40 [2021-08-27 04:56:53,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072036119] [2021-08-27 04:56:53,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:56:53,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:56:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1453, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:56:53,017 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 40 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:54,690 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-08-27 04:56:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 04:56:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-27 04:56:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:54,691 INFO L225 Difference]: With dead ends: 130 [2021-08-27 04:56:54,691 INFO L226 Difference]: Without dead ends: 96 [2021-08-27 04:56:54,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1460.2ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:56:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-27 04:56:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-08-27 04:56:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-08-27 04:56:54,698 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 85 [2021-08-27 04:56:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:54,699 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-08-27 04:56:54,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-08-27 04:56:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-27 04:56:54,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:54,700 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:54,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-27 04:56:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:54,916 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:56:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash 650863924, now seen corresponding path program 7 times [2021-08-27 04:56:54,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:54,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767929947] [2021-08-27 04:56:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:54,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:55,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:56:55,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:55,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767929947] [2021-08-27 04:56:55,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767929947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:55,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400972441] [2021-08-27 04:56:55,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:56:55,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:55,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:55,273 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:55,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:56:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:56:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:56:56,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400972441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:56,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:56,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 29 [2021-08-27 04:56:56,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591595353] [2021-08-27 04:56:56,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:56:56,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:56:56,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:56:56,891 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 30 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:57,625 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-08-27 04:56:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:56:57,626 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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 89 [2021-08-27 04:56:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:57,626 INFO L225 Difference]: With dead ends: 97 [2021-08-27 04:56:57,626 INFO L226 Difference]: Without dead ends: 97 [2021-08-27 04:56:57,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:56:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-27 04:56:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-08-27 04:56:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2021-08-27 04:56:57,629 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2021-08-27 04:56:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:57,629 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2021-08-27 04:56:57,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2021-08-27 04:56:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-27 04:56:57,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:57,630 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:57,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:57,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:56:57,841 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:56:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash -264733948, now seen corresponding path program 8 times [2021-08-27 04:56:57,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:57,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000681052] [2021-08-27 04:56:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:57,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:58,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:56:58,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:58,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000681052] [2021-08-27 04:56:58,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000681052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:58,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030060972] [2021-08-27 04:56:58,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:58,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:58,213 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:58,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:56:59,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:56:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:59,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-27 04:56:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:59,418 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:56:59,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:56:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-27 04:57:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:57:00,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030060972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:00,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:00,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-08-27 04:57:00,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367687352] [2021-08-27 04:57:00,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 04:57:00,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 04:57:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:57:00,187 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:00,855 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2021-08-27 04:57:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:57:00,855 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-08-27 04:57:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:00,856 INFO L225 Difference]: With dead ends: 166 [2021-08-27 04:57:00,856 INFO L226 Difference]: Without dead ends: 103 [2021-08-27 04:57:00,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 882.8ms TimeCoverageRelationStatistics Valid=434, Invalid=2218, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:57:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-27 04:57:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-08-27 04:57:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-08-27 04:57:00,859 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 95 [2021-08-27 04:57:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:00,859 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-08-27 04:57:00,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-08-27 04:57:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-27 04:57:00,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:00,860 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:00,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:01,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 04:57:01,085 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:01,085 INFO L82 PathProgramCache]: Analyzing trace with hash -452087993, now seen corresponding path program 9 times [2021-08-27 04:57:01,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:01,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781381412] [2021-08-27 04:57:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:01,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:57:01,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:01,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781381412] [2021-08-27 04:57:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781381412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:01,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574983490] [2021-08-27 04:57:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:57:01,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:01,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:01,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:57:03,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-27 04:57:03,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 143 conjunts are in the unsatisfiable core [2021-08-27 04:57:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:03,212 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:57:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:57:03,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:57:05,037 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 04:57:05,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:57:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-27 04:57:06,996 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:57:06,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-08-27 04:57:07,339 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-08-27 04:57:07,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 43 [2021-08-27 04:57:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:57:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574983490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:07,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:07,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 38] total 67 [2021-08-27 04:57:07,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326147173] [2021-08-27 04:57:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-27 04:57:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-27 04:57:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4214, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 04:57:07,356 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 67 states, 65 states have (on average 2.8) internal successors, (182), 64 states have internal predecessors, (182), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:12,912 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2021-08-27 04:57:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-27 04:57:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.8) internal successors, (182), 64 states have internal predecessors, (182), 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 99 [2021-08-27 04:57:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:12,913 INFO L225 Difference]: With dead ends: 223 [2021-08-27 04:57:12,913 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 04:57:12,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4105 ImplicationChecksByTransitivity, 5719.1ms TimeCoverageRelationStatistics Valid=770, Invalid=13992, Unknown=0, NotChecked=0, Total=14762 [2021-08-27 04:57:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 04:57:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2021-08-27 04:57:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-08-27 04:57:12,919 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 99 [2021-08-27 04:57:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:12,919 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-08-27 04:57:12,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.8) internal successors, (182), 64 states have internal predecessors, (182), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-08-27 04:57:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-27 04:57:12,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:12,920 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:12,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:13,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:13,137 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1035648330, now seen corresponding path program 10 times [2021-08-27 04:57:13,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:13,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659546968] [2021-08-27 04:57:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:13,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:13,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:57:13,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:13,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659546968] [2021-08-27 04:57:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659546968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:13,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616352187] [2021-08-27 04:57:13,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:57:13,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:13,508 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:13,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:57:14,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:57:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:14,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 139 conjunts are in the unsatisfiable core [2021-08-27 04:57:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:14,904 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:57:14,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:57:15,715 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 04:57:17,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 04:57:17,069 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-08-27 04:57:17,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 20 [2021-08-27 04:57:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 50 proven. 124 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:57:17,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616352187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:17,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:17,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30] total 50 [2021-08-27 04:57:17,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125885677] [2021-08-27 04:57:17,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 04:57:17,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:17,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 04:57:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2383, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:57:17,256 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 51 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:19,649 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-08-27 04:57:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 04:57:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-08-27 04:57:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:19,650 INFO L225 Difference]: With dead ends: 111 [2021-08-27 04:57:19,650 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 04:57:19,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2510.1ms TimeCoverageRelationStatistics Valid=403, Invalid=4999, Unknown=0, NotChecked=0, Total=5402 [2021-08-27 04:57:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 04:57:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-08-27 04:57:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2021-08-27 04:57:19,653 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2021-08-27 04:57:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:19,654 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2021-08-27 04:57:19,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2021-08-27 04:57:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-27 04:57:19,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:19,655 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:19,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:19,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:19,868 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2012288358, now seen corresponding path program 11 times [2021-08-27 04:57:19,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:19,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836774526] [2021-08-27 04:57:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:19,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 97 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:57:20,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:20,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836774526] [2021-08-27 04:57:20,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836774526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:20,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972243782] [2021-08-27 04:57:20,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:57:20,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:20,260 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:20,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:57:21,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-27 04:57:21,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-27 04:57:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:21,933 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:57:21,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:57:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-27 04:57:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 141 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:57:22,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972243782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:22,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:22,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-08-27 04:57:22,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32932729] [2021-08-27 04:57:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 04:57:22,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 04:57:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:57:22,799 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 41 states, 41 states have (on average 4.0) internal successors, (164), 38 states have internal predecessors, (164), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:23,545 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2021-08-27 04:57:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:57:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 38 states have internal predecessors, (164), 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 109 [2021-08-27 04:57:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:23,546 INFO L225 Difference]: With dead ends: 190 [2021-08-27 04:57:23,546 INFO L226 Difference]: Without dead ends: 117 [2021-08-27 04:57:23,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1005.5ms TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2021-08-27 04:57:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-27 04:57:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-08-27 04:57:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2021-08-27 04:57:23,548 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 109 [2021-08-27 04:57:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:23,549 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2021-08-27 04:57:23,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 38 states have internal predecessors, (164), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2021-08-27 04:57:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-08-27 04:57:23,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:23,550 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:23,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-27 04:57:23,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:23,761 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash -98177635, now seen corresponding path program 12 times [2021-08-27 04:57:23,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:23,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335394143] [2021-08-27 04:57:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:23,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:24,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:57:24,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:24,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335394143] [2021-08-27 04:57:24,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335394143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:24,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401117249] [2021-08-27 04:57:24,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:57:24,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:24,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:24,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:24,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:57:26,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-27 04:57:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-27 04:57:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:26,856 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 04:57:27,287 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 04:57:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:57:27,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401117249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:27,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:27,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 25] total 48 [2021-08-27 04:57:27,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719346080] [2021-08-27 04:57:27,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 04:57:27,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 04:57:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:57:27,298 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 48 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:29,689 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2021-08-27 04:57:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-27 04:57:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2021-08-27 04:57:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:29,690 INFO L225 Difference]: With dead ends: 170 [2021-08-27 04:57:29,690 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 04:57:29,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1985.2ms TimeCoverageRelationStatistics Valid=352, Invalid=5500, Unknown=0, NotChecked=0, Total=5852 [2021-08-27 04:57:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 04:57:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-08-27 04:57:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2021-08-27 04:57:29,694 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 113 [2021-08-27 04:57:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:29,694 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2021-08-27 04:57:29,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2021-08-27 04:57:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-08-27 04:57:29,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:29,695 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:29,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-27 04:57:29,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-27 04:57:29,905 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450592, now seen corresponding path program 13 times [2021-08-27 04:57:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:29,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868486158] [2021-08-27 04:57:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:29,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:57:30,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:30,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868486158] [2021-08-27 04:57:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868486158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:30,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845865445] [2021-08-27 04:57:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:57:30,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:30,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:30,336 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:30,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:57:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 04:57:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:57:32,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845865445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:32,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:32,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 35 [2021-08-27 04:57:32,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420064455] [2021-08-27 04:57:32,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:57:32,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:57:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:57:32,624 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 36 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:33,513 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-08-27 04:57:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:57:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-08-27 04:57:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:33,514 INFO L225 Difference]: With dead ends: 125 [2021-08-27 04:57:33,514 INFO L226 Difference]: Without dead ends: 125 [2021-08-27 04:57:33,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:57:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-27 04:57:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-08-27 04:57:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2021-08-27 04:57:33,517 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2021-08-27 04:57:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:33,518 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2021-08-27 04:57:33,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2021-08-27 04:57:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-27 04:57:33,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:33,519 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:33,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-27 04:57:33,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-27 04:57:33,721 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash -861151440, now seen corresponding path program 14 times [2021-08-27 04:57:33,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:33,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577629218] [2021-08-27 04:57:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:33,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 156 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:57:34,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:34,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577629218] [2021-08-27 04:57:34,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577629218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:34,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478998256] [2021-08-27 04:57:34,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:57:34,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:34,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:34,108 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:34,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 04:57:35,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:57:35,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-27 04:57:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:35,868 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:57:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:57:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-27 04:57:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 185 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:57:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478998256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:36,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2021-08-27 04:57:36,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435680732] [2021-08-27 04:57:36,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 04:57:36,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 04:57:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:57:36,856 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 44 states, 44 states have (on average 4.181818181818182) internal successors, (184), 41 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:37,892 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2021-08-27 04:57:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:57:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.181818181818182) internal successors, (184), 41 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-08-27 04:57:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:37,893 INFO L225 Difference]: With dead ends: 214 [2021-08-27 04:57:37,893 INFO L226 Difference]: Without dead ends: 131 [2021-08-27 04:57:37,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=654, Invalid=3252, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:57:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-27 04:57:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-08-27 04:57:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2021-08-27 04:57:37,897 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 123 [2021-08-27 04:57:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:37,897 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2021-08-27 04:57:37,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.181818181818182) internal successors, (184), 41 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2021-08-27 04:57:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-27 04:57:37,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:37,898 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:37,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-27 04:57:38,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-27 04:57:38,105 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash -363601677, now seen corresponding path program 15 times [2021-08-27 04:57:38,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:38,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618702083] [2021-08-27 04:57:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:38,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:39,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:57:39,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:39,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618702083] [2021-08-27 04:57:39,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618702083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:39,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157070238] [2021-08-27 04:57:39,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:57:39,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:39,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:39,130 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:39,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 04:57:41,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-27 04:57:41,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 124 conjunts are in the unsatisfiable core [2021-08-27 04:57:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:41,090 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:57:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:57:41,874 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 04:57:43,021 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-08-27 04:57:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 36 [2021-08-27 04:57:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 66 proven. 217 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:57:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157070238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:43,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:43,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27] total 64 [2021-08-27 04:57:43,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742432044] [2021-08-27 04:57:43,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-27 04:57:43,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-27 04:57:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3817, Unknown=0, NotChecked=0, Total=4032 [2021-08-27 04:57:43,231 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 64 states, 62 states have (on average 3.4516129032258065) internal successors, (214), 61 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:52,609 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2021-08-27 04:57:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-27 04:57:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 3.4516129032258065) internal successors, (214), 61 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-08-27 04:57:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:52,610 INFO L225 Difference]: With dead ends: 194 [2021-08-27 04:57:52,610 INFO L226 Difference]: Without dead ends: 142 [2021-08-27 04:57:52,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9423 ImplicationChecksByTransitivity, 9357.2ms TimeCoverageRelationStatistics Valid=2550, Invalid=29312, Unknown=0, NotChecked=0, Total=31862 [2021-08-27 04:57:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-27 04:57:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2021-08-27 04:57:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2021-08-27 04:57:52,615 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2021-08-27 04:57:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:52,615 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2021-08-27 04:57:52,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 3.4516129032258065) internal successors, (214), 61 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2021-08-27 04:57:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-08-27 04:57:52,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:52,617 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:52,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-27 04:57:52,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:52,831 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash -265684794, now seen corresponding path program 16 times [2021-08-27 04:57:52,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:52,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641925812] [2021-08-27 04:57:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:52,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 202 proven. 161 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:57:53,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:53,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641925812] [2021-08-27 04:57:53,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641925812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:53,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553730273] [2021-08-27 04:57:53,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:57:53,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:53,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:53,310 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:53,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 04:57:55,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:57:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:57:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-27 04:57:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:57:55,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:57:55,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:57:55,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-27 04:57:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 235 proven. 128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:57:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553730273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:56,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:57:56,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2021-08-27 04:57:56,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304872384] [2021-08-27 04:57:56,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-27 04:57:56,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:57:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-27 04:57:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 04:57:56,388 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 49 states, 49 states have (on average 4.163265306122449) internal successors, (204), 46 states have internal predecessors, (204), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:57:57,439 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-08-27 04:57:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 04:57:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.163265306122449) internal successors, (204), 46 states have internal predecessors, (204), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-08-27 04:57:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:57:57,440 INFO L225 Difference]: With dead ends: 238 [2021-08-27 04:57:57,440 INFO L226 Difference]: Without dead ends: 145 [2021-08-27 04:57:57,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1380.1ms TimeCoverageRelationStatistics Valid=800, Invalid=4030, Unknown=0, NotChecked=0, Total=4830 [2021-08-27 04:57:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-27 04:57:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2021-08-27 04:57:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2021-08-27 04:57:57,444 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 137 [2021-08-27 04:57:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:57:57,444 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2021-08-27 04:57:57,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.163265306122449) internal successors, (204), 46 states have internal predecessors, (204), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:57:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2021-08-27 04:57:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-27 04:57:57,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:57:57,445 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:57:57,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-27 04:57:57,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-27 04:57:57,653 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:57:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:57:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234313, now seen corresponding path program 17 times [2021-08-27 04:57:57,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:57:57,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749724077] [2021-08-27 04:57:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:57:57,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:57:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:58,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:57:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:57:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 27 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:57:58,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:57:58,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749724077] [2021-08-27 04:57:58,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749724077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:57:58,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758114048] [2021-08-27 04:57:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:57:58,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:57:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:57:58,794 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:57:58,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-27 04:58:01,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-27 04:58:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 207 conjunts are in the unsatisfiable core [2021-08-27 04:58:01,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:01,128 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:58:01,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:58:02,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:58:03,959 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-08-27 04:58:03,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-08-27 04:58:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 424 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:58:04,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758114048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:04,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:04,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 37] total 77 [2021-08-27 04:58:04,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507191811] [2021-08-27 04:58:04,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-27 04:58:04,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-27 04:58:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=5620, Unknown=0, NotChecked=0, Total=5852 [2021-08-27 04:58:04,193 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 77 states, 75 states have (on average 3.6) internal successors, (270), 74 states have internal predecessors, (270), 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 04:58:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:10,579 INFO L93 Difference]: Finished difference Result 214 states and 217 transitions. [2021-08-27 04:58:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-27 04:58:10,580 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 3.6) internal successors, (270), 74 states have internal predecessors, (270), 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 141 [2021-08-27 04:58:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:10,580 INFO L225 Difference]: With dead ends: 214 [2021-08-27 04:58:10,580 INFO L226 Difference]: Without dead ends: 156 [2021-08-27 04:58:10,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4074 ImplicationChecksByTransitivity, 5882.0ms TimeCoverageRelationStatistics Valid=939, Invalid=19083, Unknown=0, NotChecked=0, Total=20022 [2021-08-27 04:58:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-27 04:58:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2021-08-27 04:58:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 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 04:58:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2021-08-27 04:58:10,584 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 141 [2021-08-27 04:58:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:10,584 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2021-08-27 04:58:10,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 3.6) internal successors, (270), 74 states have internal predecessors, (270), 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 04:58:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2021-08-27 04:58:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-27 04:58:10,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:10,586 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:10,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:10,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-27 04:58:10,809 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:58:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 679728988, now seen corresponding path program 18 times [2021-08-27 04:58:10,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:10,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501488411] [2021-08-27 04:58:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:10,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:11,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 254 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:58:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501488411] [2021-08-27 04:58:11,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501488411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2180461] [2021-08-27 04:58:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:58:11,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:11,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:11,365 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:11,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-27 04:58:14,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-27 04:58:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 100 conjunts are in the unsatisfiable core [2021-08-27 04:58:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:14,251 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:58:14,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:58:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 300 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:17,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2180461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:17,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:17,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 36] total 63 [2021-08-27 04:58:17,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267862952] [2021-08-27 04:58:17,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-27 04:58:17,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-27 04:58:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3467, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:58:17,485 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 63 states, 63 states have (on average 4.063492063492063) internal successors, (256), 60 states have internal predecessors, (256), 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 04:58:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:19,399 INFO L93 Difference]: Finished difference Result 272 states and 277 transitions. [2021-08-27 04:58:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-27 04:58:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.063492063492063) internal successors, (256), 60 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-08-27 04:58:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:19,401 INFO L225 Difference]: With dead ends: 272 [2021-08-27 04:58:19,401 INFO L226 Difference]: Without dead ends: 159 [2021-08-27 04:58:19,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 2531.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=8396, Unknown=0, NotChecked=0, Total=9506 [2021-08-27 04:58:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-27 04:58:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-08-27 04:58:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 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 04:58:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2021-08-27 04:58:19,404 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 151 [2021-08-27 04:58:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:19,404 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2021-08-27 04:58:19,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.063492063492063) internal successors, (256), 60 states have internal predecessors, (256), 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 04:58:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2021-08-27 04:58:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-08-27 04:58:19,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:19,405 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:19,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-27 04:58:19,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-27 04:58:19,617 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:58:19,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:19,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2115279201, now seen corresponding path program 19 times [2021-08-27 04:58:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:19,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291756639] [2021-08-27 04:58:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:19,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:20,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:20,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:20,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291756639] [2021-08-27 04:58:20,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291756639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:20,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098839850] [2021-08-27 04:58:20,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:58:20,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:20,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:20,902 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:20,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-27 04:58:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 221 conjunts are in the unsatisfiable core [2021-08-27 04:58:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:24,624 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 04:58:27,727 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-27 04:58:27,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2021-08-27 04:58:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 612 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:58:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098839850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:27,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:27,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42] total 83 [2021-08-27 04:58:27,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409467779] [2021-08-27 04:58:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-27 04:58:27,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-27 04:58:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=6529, Unknown=0, NotChecked=0, Total=6806 [2021-08-27 04:58:27,739 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 83 states, 81 states have (on average 3.6296296296296298) internal successors, (294), 80 states have internal predecessors, (294), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:32,635 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2021-08-27 04:58:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-27 04:58:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 3.6296296296296298) internal successors, (294), 80 states have internal predecessors, (294), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-08-27 04:58:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:32,637 INFO L225 Difference]: With dead ends: 230 [2021-08-27 04:58:32,637 INFO L226 Difference]: Without dead ends: 166 [2021-08-27 04:58:32,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 4569.6ms TimeCoverageRelationStatistics Valid=604, Invalid=13916, Unknown=0, NotChecked=0, Total=14520 [2021-08-27 04:58:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-27 04:58:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-08-27 04:58:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 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 04:58:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2021-08-27 04:58:32,641 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 155 [2021-08-27 04:58:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:32,641 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2021-08-27 04:58:32,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 3.6296296296296298) internal successors, (294), 80 states have internal predecessors, (294), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2021-08-27 04:58:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-27 04:58:32,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:32,642 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:32,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:32,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:32,869 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:58:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:32,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1717497950, now seen corresponding path program 20 times [2021-08-27 04:58:32,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:32,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849033707] [2021-08-27 04:58:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:32,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:33,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 120 proven. 370 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:58:33,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:33,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849033707] [2021-08-27 04:58:33,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849033707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:33,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45165580] [2021-08-27 04:58:33,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:58:33,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:33,481 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:33,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-27 04:58:36,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:58:36,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-27 04:58:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:36,149 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:58:36,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:58:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 153 proven. 337 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:58:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45165580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:38,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:38,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 55 [2021-08-27 04:58:38,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144677338] [2021-08-27 04:58:38,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-27 04:58:38,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-27 04:58:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 04:58:38,020 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 56 states, 54 states have (on average 4.333333333333333) internal successors, (234), 53 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:39,627 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-08-27 04:58:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 04:58:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 4.333333333333333) internal successors, (234), 53 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-08-27 04:58:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:39,628 INFO L225 Difference]: With dead ends: 167 [2021-08-27 04:58:39,628 INFO L226 Difference]: Without dead ends: 167 [2021-08-27 04:58:39,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 1395.6ms TimeCoverageRelationStatistics Valid=433, Invalid=4537, Unknown=0, NotChecked=0, Total=4970 [2021-08-27 04:58:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-27 04:58:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-08-27 04:58:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 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 04:58:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2021-08-27 04:58:39,631 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 159 [2021-08-27 04:58:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2021-08-27 04:58:39,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 4.333333333333333) internal successors, (234), 53 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2021-08-27 04:58:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-27 04:58:39,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:39,633 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:39,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:39,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-27 04:58:39,850 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:58:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash -845931790, now seen corresponding path program 21 times [2021-08-27 04:58:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:39,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936116486] [2021-08-27 04:58:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:39,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 312 proven. 241 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:58:40,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:40,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936116486] [2021-08-27 04:58:40,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936116486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:40,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525575465] [2021-08-27 04:58:40,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:58:40,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:40,444 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:58:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-27 04:58:45,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-27 04:58:45,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:58:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-27 04:58:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:45,829 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:58:45,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:58:46,357 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 23 treesize of output 19 [2021-08-27 04:58:47,337 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-08-27 04:58:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 46 [2021-08-27 04:58:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 40 proven. 43 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-08-27 04:58:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525575465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:47,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:47,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 42 [2021-08-27 04:58:47,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730868342] [2021-08-27 04:58:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-27 04:58:47,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-27 04:58:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:58:47,472 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 42 states, 41 states have (on average 3.8048780487804876) internal successors, (156), 39 states have internal predecessors, (156), 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 04:58:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:52,619 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2021-08-27 04:58:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-27 04:58:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.8048780487804876) internal successors, (156), 39 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-08-27 04:58:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:52,620 INFO L225 Difference]: With dead ends: 285 [2021-08-27 04:58:52,620 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:58:52,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 4972.4ms TimeCoverageRelationStatistics Valid=2245, Invalid=15845, Unknown=0, NotChecked=0, Total=18090 [2021-08-27 04:58:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:58:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:58:52,622 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 04:58:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:58:52,622 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2021-08-27 04:58:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:52,622 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:58:52,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.8048780487804876) internal successors, (156), 39 states have internal predecessors, (156), 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 04:58:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:58:52,623 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:58:52,624 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr0REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr1REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr2REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr3REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr4REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr5REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr6REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr7REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr8REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr9REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:58:52,625 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:58:52,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:58:52,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:58:52,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:58:52,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:58:52,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-27 04:58:52,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:52,832 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:58:52,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:58:52 BoogieIcfgContainer [2021-08-27 04:58:52,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:58:52,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:58:52,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:58:52,835 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:58:52,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:55:02" (3/4) ... [2021-08-27 04:58:52,837 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:58:52,842 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:58:52,842 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcmp [2021-08-27 04:58:52,843 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:58:52,843 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:58:52,843 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:58:52,843 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:58:52,843 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:58:52,843 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:58:52,848 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-08-27 04:58:52,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-08-27 04:58:52,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:58:52,849 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:58:52,880 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:58:52,881 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:58:52,881 INFO L168 Benchmark]: Toolchain (without parser) took 231445.01 ms. Allocated memory was 65.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 44.3 MB in the beginning and 505.9 MB in the end (delta: -461.6 MB). Peak memory consumption was 662.0 MB. Max. memory is 16.1 GB. [2021-08-27 04:58:52,882 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 65.0 MB. Free memory was 45.9 MB in the beginning and 45.9 MB in the end (delta: 85.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:58:52,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.49 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 42.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:58:52,882 INFO L168 Benchmark]: Boogie Preprocessor took 77.32 ms. Allocated memory is still 65.0 MB. Free memory was 42.2 MB in the beginning and 39.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:58:52,884 INFO L168 Benchmark]: RCFGBuilder took 831.67 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 39.7 MB in the beginning and 54.0 MB in the end (delta: -14.3 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:58:52,885 INFO L168 Benchmark]: TraceAbstraction took 230076.10 ms. Allocated memory was 88.1 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 53.6 MB in the beginning and 510.2 MB in the end (delta: -456.6 MB). Peak memory consumption was 643.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:58:52,885 INFO L168 Benchmark]: Witness Printer took 46.51 ms. Allocated memory is still 1.2 GB. Free memory was 510.2 MB in the beginning and 505.9 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:58:52,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 65.0 MB. Free memory was 45.9 MB in the beginning and 45.9 MB in the end (delta: 85.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 408.49 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 42.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.32 ms. Allocated memory is still 65.0 MB. Free memory was 42.2 MB in the beginning and 39.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 831.67 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 39.7 MB in the beginning and 54.0 MB in the end (delta: -14.3 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 230076.10 ms. Allocated memory was 88.1 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 53.6 MB in the beginning and 510.2 MB in the end (delta: -456.6 MB). Peak memory consumption was 643.2 MB. Max. memory is 16.1 GB. * Witness Printer took 46.51 ms. Allocated memory is still 1.2 GB. Free memory was 510.2 MB in the beginning and 505.9 MB in the end (delta: 4.3 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: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: 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: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: 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, 73 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 230012.3ms, OverallIterations: 53, TraceHistogramMax: 12, EmptinessCheckTime: 39.6ms, AutomataDifference: 124603.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1610 SDtfs, 6374 SDslu, 11663 SDs, 0 SdLazy, 54998 SolverSat, 1440 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 30898.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4552 GetRequests, 2390 SyntacticMatches, 18 SemanticMatches, 2144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42651 ImplicationChecksByTransitivity, 113494.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=52, InterpolantAutomatonStates: 1205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 166.0ms AutomataMinimizationTime, 53 MinimizatonAttempts, 258 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 541.3ms SsaConstructionTime, 6440.2ms SatisfiabilityAnalysisTime, 57832.8ms InterpolantComputationTime, 5991 NumberOfCodeBlocks, 5891 NumberOfCodeBlocksAsserted, 174 NumberOfCheckSat, 5904 ConstructedInterpolants, 310 QuantifiedInterpolants, 64018 SizeOfPredicates, 696 NumberOfNonLiveVariables, 12594 ConjunctsInSsa, 2380 ConjunctsInUnsatCore, 87 InterpolantComputations, 21 PerfectInterpolantSequences, 6227/13969 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:58:52,949 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...