./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/strreplace-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50bdaf600d03af0a677a59daf6a875dbe69c10b2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 17:58:57,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:58:57,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:58:57,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:58:57,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:58:57,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:58:57,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:58:57,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:58:57,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:58:57,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:58:57,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:58:57,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:58:57,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:58:57,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:58:57,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:58:57,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:58:57,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:58:57,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:58:57,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:58:57,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:58:57,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:58:57,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:58:57,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:58:57,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:58:57,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:58:57,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:58:57,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:58:57,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:58:57,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:58:57,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:58:57,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:58:57,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:58:57,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:58:57,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:58:57,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:58:57,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:58:57,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:58:57,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:58:57,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:58:57,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:58:57,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:58:57,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 17:58:57,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:58:57,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:58:57,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:58:57,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:58:57,551 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:58:57,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:58:57,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:58:57,552 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:58:57,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:58:57,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:58:57,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:58:57,553 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:58:57,553 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:58:57,554 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:58:57,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:58:57,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:58:57,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:58:57,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:58:57,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:58:57,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:58:57,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:58:57,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:58:57,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:58:57,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:58:57,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:58:57,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 17:58:57,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 17:58:57,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:58:57,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 50bdaf600d03af0a677a59daf6a875dbe69c10b2 [2020-10-19 17:58:57,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:58:57,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:58:57,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:58:57,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:58:57,887 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:58:57,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-10-19 17:58:57,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeee43193/060245d79caa45feb3f73eae5e44ef1f/FLAG202db6862 [2020-10-19 17:58:58,457 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:58:58,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-10-19 17:58:58,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeee43193/060245d79caa45feb3f73eae5e44ef1f/FLAG202db6862 [2020-10-19 17:58:58,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeee43193/060245d79caa45feb3f73eae5e44ef1f [2020-10-19 17:58:58,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:58:58,782 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:58:58,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:58:58,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:58:58,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:58:58,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:58:58" (1/1) ... [2020-10-19 17:58:58,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:58, skipping insertion in model container [2020-10-19 17:58:58,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:58:58" (1/1) ... [2020-10-19 17:58:58,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:58:58,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:58:59,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:58:59,207 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:58:59,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:58:59,312 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:58:59,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59 WrapperNode [2020-10-19 17:58:59,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:58:59,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:58:59,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:58:59,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:58:59,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... [2020-10-19 17:58:59,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:58:59,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:58:59,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:58:59,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:58:59,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:58:59,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:58:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:58:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 17:58:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 17:58:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 17:58:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 17:58:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 17:58:59,464 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrreplace [2020-10-19 17:58:59,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:58:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 17:58:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 17:58:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 17:58:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 17:58:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 17:58:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 17:58:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 17:58:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 17:58:59,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 17:58:59,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 17:58:59,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 17:58:59,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 17:58:59,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 17:58:59,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 17:58:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 17:58:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 17:58:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 17:58:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 17:58:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 17:58:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 17:58:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 17:58:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 17:58:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 17:58:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 17:58:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 17:58:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 17:58:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 17:58:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 17:58:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 17:58:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 17:58:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 17:58:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 17:58:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 17:58:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 17:58:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 17:58:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 17:58:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 17:58:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 17:58:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 17:58:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 17:58:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 17:58:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 17:58:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 17:58:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 17:58:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 17:58:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 17:58:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 17:58:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 17:58:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 17:58:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 17:58:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 17:58:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 17:58:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 17:58:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 17:58:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 17:58:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 17:58:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:58:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 17:58:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:58:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 17:58:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 17:58:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 17:58:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 17:58:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:58:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 17:58:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 17:58:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 17:58:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 17:58:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 17:58:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 17:58:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 17:58:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 17:58:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 17:58:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 17:58:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 17:58:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 17:58:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 17:58:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 17:58:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 17:58:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 17:58:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 17:58:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 17:58:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 17:58:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 17:58:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 17:58:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 17:58:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 17:58:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 17:58:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 17:58:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 17:58:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 17:58:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 17:58:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 17:58:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 17:58:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 17:58:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 17:58:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 17:58:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 17:58:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 17:58:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 17:58:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 17:58:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 17:58:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 17:58:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 17:58:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 17:58:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 17:58:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 17:58:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:58:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 17:58:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure cstrreplace [2020-10-19 17:58:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 17:58:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 17:58:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:58:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 17:58:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:58:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:58:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:59:00,104 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:59:00,104 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 17:59:00,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:00 BoogieIcfgContainer [2020-10-19 17:59:00,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:59:00,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:59:00,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:59:00,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:59:00,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:58:58" (1/3) ... [2020-10-19 17:59:00,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b41b8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:00, skipping insertion in model container [2020-10-19 17:59:00,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:59" (2/3) ... [2020-10-19 17:59:00,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b41b8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:00, skipping insertion in model container [2020-10-19 17:59:00,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:00" (3/3) ... [2020-10-19 17:59:00,115 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2020-10-19 17:59:00,127 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:59:00,135 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-10-19 17:59:00,151 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-10-19 17:59:00,181 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:59:00,184 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:59:00,185 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:59:00,185 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:59:00,186 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:59:00,187 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:59:00,187 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:59:00,187 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:59:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-19 17:59:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:59:00,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:00,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:00,263 INFO L429 AbstractCegarLoop]: === Iteration 1 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:00,278 INFO L82 PathProgramCache]: Analyzing trace with hash -610270170, now seen corresponding path program 1 times [2020-10-19 17:59:00,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:00,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354654615] [2020-10-19 17:59:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:00,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354654615] [2020-10-19 17:59:00,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:00,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 17:59:00,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048636518] [2020-10-19 17:59:00,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:59:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:59:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:00,526 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-10-19 17:59:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:00,661 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-19 17:59:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:59:00,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 17:59:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:00,673 INFO L225 Difference]: With dead ends: 40 [2020-10-19 17:59:00,673 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 17:59:00,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 17:59:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-19 17:59:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 17:59:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-19 17:59:00,716 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 10 [2020-10-19 17:59:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:00,716 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-19 17:59:00,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:59:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-19 17:59:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:59:00,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:00,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:00,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 17:59:00,718 INFO L429 AbstractCegarLoop]: === Iteration 2 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -610270169, now seen corresponding path program 1 times [2020-10-19 17:59:00,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:00,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107243490] [2020-10-19 17:59:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:00,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:00,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107243490] [2020-10-19 17:59:00,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:00,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:00,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647628987] [2020-10-19 17:59:00,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:00,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:00,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:00,831 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2020-10-19 17:59:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:00,941 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-19 17:59:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:00,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 17:59:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:00,943 INFO L225 Difference]: With dead ends: 36 [2020-10-19 17:59:00,943 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 17:59:00,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 17:59:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-19 17:59:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 17:59:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-19 17:59:00,950 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 10 [2020-10-19 17:59:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:00,951 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-19 17:59:00,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-19 17:59:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:59:00,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:00,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:00,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 17:59:00,953 INFO L429 AbstractCegarLoop]: === Iteration 3 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -610270116, now seen corresponding path program 1 times [2020-10-19 17:59:00,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:00,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960387441] [2020-10-19 17:59:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:01,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960387441] [2020-10-19 17:59:01,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:01,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:01,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272471531] [2020-10-19 17:59:01,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:01,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:01,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:01,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:01,039 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 5 states. [2020-10-19 17:59:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:01,146 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-19 17:59:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:01,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 17:59:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:01,150 INFO L225 Difference]: With dead ends: 44 [2020-10-19 17:59:01,150 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 17:59:01,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 17:59:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-19 17:59:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 17:59:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-19 17:59:01,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2020-10-19 17:59:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:01,163 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-19 17:59:01,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-19 17:59:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:59:01,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:01,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:01,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 17:59:01,165 INFO L429 AbstractCegarLoop]: === Iteration 4 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash -610210534, now seen corresponding path program 1 times [2020-10-19 17:59:01,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:01,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941492092] [2020-10-19 17:59:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:01,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941492092] [2020-10-19 17:59:01,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:01,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529661255] [2020-10-19 17:59:01,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:01,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:01,259 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 5 states. [2020-10-19 17:59:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:01,394 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-19 17:59:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:01,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 17:59:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:01,396 INFO L225 Difference]: With dead ends: 48 [2020-10-19 17:59:01,396 INFO L226 Difference]: Without dead ends: 48 [2020-10-19 17:59:01,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-19 17:59:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-19 17:59:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 17:59:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-19 17:59:01,404 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2020-10-19 17:59:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:01,405 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-19 17:59:01,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-19 17:59:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 17:59:01,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:01,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:01,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 17:59:01,407 INFO L429 AbstractCegarLoop]: === Iteration 5 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1176041719, now seen corresponding path program 1 times [2020-10-19 17:59:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:01,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12022074] [2020-10-19 17:59:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:01,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12022074] [2020-10-19 17:59:01,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:01,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:01,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61244149] [2020-10-19 17:59:01,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:01,486 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-19 17:59:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:01,607 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-19 17:59:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:01,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-19 17:59:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:01,609 INFO L225 Difference]: With dead ends: 37 [2020-10-19 17:59:01,609 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 17:59:01,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 17:59:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-19 17:59:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 17:59:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-19 17:59:01,615 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2020-10-19 17:59:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:01,616 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-19 17:59:01,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-19 17:59:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 17:59:01,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:01,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:01,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 17:59:01,618 INFO L429 AbstractCegarLoop]: === Iteration 6 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:01,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1176041720, now seen corresponding path program 1 times [2020-10-19 17:59:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:01,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622648799] [2020-10-19 17:59:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:01,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622648799] [2020-10-19 17:59:01,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:01,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:01,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955348327] [2020-10-19 17:59:01,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:01,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:01,771 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-10-19 17:59:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:01,987 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-19 17:59:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:01,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-19 17:59:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:01,991 INFO L225 Difference]: With dead ends: 47 [2020-10-19 17:59:01,991 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 17:59:01,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 17:59:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-19 17:59:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 17:59:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-19 17:59:01,997 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 14 [2020-10-19 17:59:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:01,997 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-19 17:59:01,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-19 17:59:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 17:59:01,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:01,999 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:01,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 17:59:01,999 INFO L429 AbstractCegarLoop]: === Iteration 7 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash 415323869, now seen corresponding path program 1 times [2020-10-19 17:59:02,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987117759] [2020-10-19 17:59:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987117759] [2020-10-19 17:59:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204636896] [2020-10-19 17:59:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 17:59:02,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:02,252 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:02,252 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:02,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:02,259 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:02,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:59:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:02,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 17:59:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718097322] [2020-10-19 17:59:02,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:02,305 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2020-10-19 17:59:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:02,436 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-19 17:59:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:02,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-19 17:59:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:02,438 INFO L225 Difference]: With dead ends: 49 [2020-10-19 17:59:02,439 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 17:59:02,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 17:59:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-10-19 17:59:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 17:59:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-19 17:59:02,444 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2020-10-19 17:59:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:02,445 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-19 17:59:02,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-19 17:59:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:02,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:02,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:02,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-19 17:59:02,648 INFO L429 AbstractCegarLoop]: === Iteration 8 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1580673573, now seen corresponding path program 1 times [2020-10-19 17:59:02,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:02,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315179247] [2020-10-19 17:59:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315179247] [2020-10-19 17:59:02,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:02,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-19 17:59:02,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138585096] [2020-10-19 17:59:02,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 17:59:02,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 17:59:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:59:02,789 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 9 states. [2020-10-19 17:59:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,041 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-19 17:59:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:03,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-19 17:59:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,043 INFO L225 Difference]: With dead ends: 51 [2020-10-19 17:59:03,043 INFO L226 Difference]: Without dead ends: 51 [2020-10-19 17:59:03,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:59:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-19 17:59:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-19 17:59:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-19 17:59:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-19 17:59:03,049 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 19 [2020-10-19 17:59:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,049 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-19 17:59:03,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 17:59:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-19 17:59:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:03,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 17:59:03,051 INFO L429 AbstractCegarLoop]: === Iteration 9 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2127487709, now seen corresponding path program 1 times [2020-10-19 17:59:03,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915219935] [2020-10-19 17:59:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915219935] [2020-10-19 17:59:03,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:03,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-19 17:59:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111148012] [2020-10-19 17:59:03,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 17:59:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 17:59:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-19 17:59:03,199 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2020-10-19 17:59:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,475 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-19 17:59:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 17:59:03,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-19 17:59:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,477 INFO L225 Difference]: With dead ends: 64 [2020-10-19 17:59:03,477 INFO L226 Difference]: Without dead ends: 64 [2020-10-19 17:59:03,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-19 17:59:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-10-19 17:59:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 17:59:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-19 17:59:03,493 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 19 [2020-10-19 17:59:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,495 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-19 17:59:03,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 17:59:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-19 17:59:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 17:59:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 17:59:03,500 INFO L429 AbstractCegarLoop]: === Iteration 10 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1797581199, now seen corresponding path program 1 times [2020-10-19 17:59:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922211473] [2020-10-19 17:59:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-19 17:59:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922211473] [2020-10-19 17:59:03,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:03,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250853845] [2020-10-19 17:59:03,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:03,622 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 6 states. [2020-10-19 17:59:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,716 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-19 17:59:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:03,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-19 17:59:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,717 INFO L225 Difference]: With dead ends: 61 [2020-10-19 17:59:03,717 INFO L226 Difference]: Without dead ends: 42 [2020-10-19 17:59:03,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-19 17:59:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-10-19 17:59:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 17:59:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-19 17:59:03,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 20 [2020-10-19 17:59:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,721 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-19 17:59:03,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-19 17:59:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 17:59:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,722 INFO L422 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] [2020-10-19 17:59:03,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 17:59:03,722 INFO L429 AbstractCegarLoop]: === Iteration 11 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash 956679290, now seen corresponding path program 1 times [2020-10-19 17:59:03,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316862596] [2020-10-19 17:59:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316862596] [2020-10-19 17:59:03,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024976334] [2020-10-19 17:59:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 17:59:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:04,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:04,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-10-19 17:59:04,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643776314] [2020-10-19 17:59:04,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 17:59:04,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 17:59:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:59:04,029 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-19 17:59:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:04,277 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-19 17:59:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:04,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-19 17:59:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:04,279 INFO L225 Difference]: With dead ends: 44 [2020-10-19 17:59:04,280 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 17:59:04,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:59:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 17:59:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-19 17:59:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 17:59:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-19 17:59:04,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 23 [2020-10-19 17:59:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:04,284 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-19 17:59:04,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 17:59:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-19 17:59:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 17:59:04,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:04,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:04,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:04,495 INFO L429 AbstractCegarLoop]: === Iteration 12 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:04,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash -403117159, now seen corresponding path program 2 times [2020-10-19 17:59:04,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:04,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873698488] [2020-10-19 17:59:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:04,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:04,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873698488] [2020-10-19 17:59:04,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693778638] [2020-10-19 17:59:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:04,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:59:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-19 17:59:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:04,927 INFO L384 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 14 treesize of output 10 [2020-10-19 17:59:04,928 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,935 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:04,937 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:04,937 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-10-19 17:59:05,148 INFO L384 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 [2020-10-19 17:59:05,149 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:05,150 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:05,151 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:05,151 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-10-19 17:59:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:05,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:05,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-10-19 17:59:05,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101768859] [2020-10-19 17:59:05,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-19 17:59:05,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-19 17:59:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:59:05,156 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 19 states. [2020-10-19 17:59:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:05,660 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-19 17:59:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:05,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-19 17:59:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:05,661 INFO L225 Difference]: With dead ends: 59 [2020-10-19 17:59:05,661 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 17:59:05,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2020-10-19 17:59:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 17:59:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-19 17:59:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-19 17:59:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-19 17:59:05,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2020-10-19 17:59:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:05,668 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-19 17:59:05,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-19 17:59:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-19 17:59:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 17:59:05,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:05,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:05,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 17:59:05,880 INFO L429 AbstractCegarLoop]: === Iteration 13 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1476818276, now seen corresponding path program 3 times [2020-10-19 17:59:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:05,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003436007] [2020-10-19 17:59:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:06,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003436007] [2020-10-19 17:59:06,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610187547] [2020-10-19 17:59:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:06,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 17:59:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:06,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 17:59:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:06,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:06,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-10-19 17:59:06,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738287862] [2020-10-19 17:59:06,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-19 17:59:06,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:06,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-19 17:59:06,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:59:06,359 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 19 states. [2020-10-19 17:59:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:06,737 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-19 17:59:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 17:59:06,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-10-19 17:59:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:06,738 INFO L225 Difference]: With dead ends: 52 [2020-10-19 17:59:06,738 INFO L226 Difference]: Without dead ends: 52 [2020-10-19 17:59:06,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:59:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-19 17:59:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-19 17:59:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-19 17:59:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-19 17:59:06,743 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 32 [2020-10-19 17:59:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:06,743 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-19 17:59:06,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-19 17:59:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-19 17:59:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-19 17:59:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:06,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:06,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:06,946 INFO L429 AbstractCegarLoop]: === Iteration 14 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:06,946 INFO L82 PathProgramCache]: Analyzing trace with hash -227169609, now seen corresponding path program 4 times [2020-10-19 17:59:06,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:06,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888309039] [2020-10-19 17:59:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:07,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888309039] [2020-10-19 17:59:07,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176376644] [2020-10-19 17:59:07,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:07,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 17:59:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-19 17:59:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:07,265 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:07,265 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:07,273 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,273 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:59:07,384 INFO L384 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 [2020-10-19 17:59:07,385 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:07,390 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,391 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-10-19 17:59:07,591 INFO L384 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 24 treesize of output 18 [2020-10-19 17:59:07,593 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:07,604 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-19 17:59:07,619 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:07,620 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-10-19 17:59:07,621 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:07,640 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,641 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-10-19 17:59:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:07,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:07,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-10-19 17:59:07,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809970435] [2020-10-19 17:59:07,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-19 17:59:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 17:59:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:59:07,654 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 24 states. [2020-10-19 17:59:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:08,660 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-19 17:59:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-19 17:59:08,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-10-19 17:59:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:08,661 INFO L225 Difference]: With dead ends: 89 [2020-10-19 17:59:08,662 INFO L226 Difference]: Without dead ends: 57 [2020-10-19 17:59:08,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2020-10-19 17:59:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-19 17:59:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-19 17:59:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 17:59:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-19 17:59:08,667 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 37 [2020-10-19 17:59:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:08,667 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-19 17:59:08,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-19 17:59:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-19 17:59:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-19 17:59:08,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:08,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:08,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 17:59:08,881 INFO L429 AbstractCegarLoop]: === Iteration 15 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1399570668, now seen corresponding path program 5 times [2020-10-19 17:59:08,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:08,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733093306] [2020-10-19 17:59:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733093306] [2020-10-19 17:59:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91227603] [2020-10-19 17:59:09,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:09,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-19 17:59:09,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-19 17:59:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:09,230 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:09,230 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:09,237 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:09,238 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:09,238 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:59:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:09,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:09,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-10-19 17:59:09,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092312573] [2020-10-19 17:59:09,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 17:59:09,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:09,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 17:59:09,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-19 17:59:09,364 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 16 states. [2020-10-19 17:59:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:09,823 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-19 17:59:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:09,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-19 17:59:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:09,825 INFO L225 Difference]: With dead ends: 63 [2020-10-19 17:59:09,825 INFO L226 Difference]: Without dead ends: 63 [2020-10-19 17:59:09,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-19 17:59:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-19 17:59:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-19 17:59:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 17:59:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-19 17:59:09,829 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 41 [2020-10-19 17:59:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:09,829 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-19 17:59:09,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 17:59:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-19 17:59:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-19 17:59:09,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:09,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:10,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:10,040 INFO L429 AbstractCegarLoop]: === Iteration 16 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1288634049, now seen corresponding path program 6 times [2020-10-19 17:59:10,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:10,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256893478] [2020-10-19 17:59:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:10,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256893478] [2020-10-19 17:59:10,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2351765] [2020-10-19 17:59:10,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:10,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-19 17:59:10,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-19 17:59:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:10,585 INFO L384 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 14 treesize of output 10 [2020-10-19 17:59:10,585 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:10,591 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:10,592 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:10,592 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-10-19 17:59:10,743 INFO L384 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 [2020-10-19 17:59:10,744 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:10,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:10,746 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:10,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-19 17:59:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:10,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:10,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2020-10-19 17:59:10,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664513898] [2020-10-19 17:59:10,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-19 17:59:10,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-19 17:59:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-19 17:59:10,754 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 25 states. [2020-10-19 17:59:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:11,575 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-10-19 17:59:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-19 17:59:11,577 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-19 17:59:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:11,578 INFO L225 Difference]: With dead ends: 104 [2020-10-19 17:59:11,578 INFO L226 Difference]: Without dead ends: 68 [2020-10-19 17:59:11,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2020-10-19 17:59:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-19 17:59:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-19 17:59:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 17:59:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-19 17:59:11,583 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 46 [2020-10-19 17:59:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:11,583 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-19 17:59:11,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-19 17:59:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-19 17:59:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-19 17:59:11,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:11,585 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:11,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 17:59:11,795 INFO L429 AbstractCegarLoop]: === Iteration 17 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1360591486, now seen corresponding path program 7 times [2020-10-19 17:59:11,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:11,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703781922] [2020-10-19 17:59:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:12,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:12,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703781922] [2020-10-19 17:59:12,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544509887] [2020-10-19 17:59:12,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-19 17:59:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:12,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:12,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2020-10-19 17:59:12,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686996237] [2020-10-19 17:59:12,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-19 17:59:12,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:12,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-19 17:59:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-19 17:59:12,309 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 23 states. [2020-10-19 17:59:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:13,058 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-19 17:59:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 17:59:13,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-19 17:59:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:13,060 INFO L225 Difference]: With dead ends: 74 [2020-10-19 17:59:13,061 INFO L226 Difference]: Without dead ends: 74 [2020-10-19 17:59:13,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2020-10-19 17:59:13,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-19 17:59:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-19 17:59:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-19 17:59:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-19 17:59:13,065 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2020-10-19 17:59:13,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:13,066 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-19 17:59:13,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-19 17:59:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-19 17:59:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-19 17:59:13,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:13,067 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:13,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 17:59:13,279 INFO L429 AbstractCegarLoop]: === Iteration 18 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:13,279 INFO L82 PathProgramCache]: Analyzing trace with hash -278982767, now seen corresponding path program 8 times [2020-10-19 17:59:13,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:13,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879560971] [2020-10-19 17:59:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:13,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:13,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879560971] [2020-10-19 17:59:13,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993771088] [2020-10-19 17:59:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:13,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:59:13,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-19 17:59:13,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:13,860 INFO L384 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 14 treesize of output 10 [2020-10-19 17:59:13,861 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:13,875 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:13,876 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:13,876 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-10-19 17:59:14,057 INFO L384 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 [2020-10-19 17:59:14,058 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:14,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:14,059 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:14,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-19 17:59:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:14,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:14,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2020-10-19 17:59:14,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538181890] [2020-10-19 17:59:14,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-19 17:59:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-19 17:59:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-10-19 17:59:14,068 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 28 states. [2020-10-19 17:59:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:15,458 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-10-19 17:59:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-19 17:59:15,459 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2020-10-19 17:59:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:15,460 INFO L225 Difference]: With dead ends: 128 [2020-10-19 17:59:15,460 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 17:59:15,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2020-10-19 17:59:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 17:59:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-19 17:59:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 17:59:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-19 17:59:15,464 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 55 [2020-10-19 17:59:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:15,465 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-19 17:59:15,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-19 17:59:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-19 17:59:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-19 17:59:15,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:15,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:15,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 17:59:15,676 INFO L429 AbstractCegarLoop]: === Iteration 19 === [cstrreplaceErr2REQUIRES_VIOLATION, cstrreplaceErr3REQUIRES_VIOLATION, cstrreplaceErr4REQUIRES_VIOLATION, cstrreplaceErr5REQUIRES_VIOLATION, cstrreplaceErr0REQUIRES_VIOLATION, cstrreplaceErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -714725714, now seen corresponding path program 9 times [2020-10-19 17:59:15,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:15,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371095582] [2020-10-19 17:59:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:15,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:15,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371095582] [2020-10-19 17:59:15,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994811438] [2020-10-19 17:59:15,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:16,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-19 17:59:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-19 17:59:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:16,060 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:16,061 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:16,065 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:16,065 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:16,065 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 17:59:16,103 INFO L384 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 [2020-10-19 17:59:16,104 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:16,108 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:16,109 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:16,110 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-10-19 17:59:16,273 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:16,274 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2020-10-19 17:59:16,274 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-19 17:59:16,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:16,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 17:59:16,290 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-10-19 17:59:16,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2020-10-19 17:59:16,324 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-19 17:59:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-19 17:59:16,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:16,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2020-10-19 17:59:16,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666752247] [2020-10-19 17:59:16,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-19 17:59:16,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 17:59:16,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:59:16,468 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 24 states. [2020-10-19 17:59:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:17,658 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-19 17:59:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 17:59:17,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-19 17:59:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:17,659 INFO L225 Difference]: With dead ends: 75 [2020-10-19 17:59:17,659 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 17:59:17,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2020-10-19 17:59:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 17:59:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 17:59:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 17:59:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 17:59:17,661 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2020-10-19 17:59:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:17,661 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 17:59:17,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-19 17:59:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 17:59:17,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 17:59:17,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:17,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 05:59:17 BoogieIcfgContainer [2020-10-19 17:59:17,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 17:59:17,868 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 17:59:17,868 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 17:59:17,868 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 17:59:17,869 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:00" (3/4) ... [2020-10-19 17:59:17,873 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 17:59:17,880 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 17:59:17,880 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrreplace [2020-10-19 17:59:17,880 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-10-19 17:59:17,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-10-19 17:59:17,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-10-19 17:59:17,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-10-19 17:59:17,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 17:59:17,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-10-19 17:59:17,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-10-19 17:59:17,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-19 17:59:17,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 17:59:17,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 17:59:17,947 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 17:59:17,947 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 17:59:17,949 INFO L168 Benchmark]: Toolchain (without parser) took 19172.63 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 379.6 MB). Free memory was 954.6 MB in the beginning and 1.3 GB in the end (delta: -305.0 MB). Peak memory consumption was 74.6 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:17,949 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:59:17,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -167.2 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:17,950 INFO L168 Benchmark]: Boogie Preprocessor took 70.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:17,950 INFO L168 Benchmark]: RCFGBuilder took 719.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:17,951 INFO L168 Benchmark]: TraceAbstraction took 17760.22 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 245.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -198.1 MB). Peak memory consumption was 47.3 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:17,951 INFO L168 Benchmark]: Witness Printer took 79.14 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:17,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 529.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -167.2 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 70.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 719.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17760.22 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 245.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -198.1 MB). Peak memory consumption was 47.3 MB. Max. memory is 11.5 GB. * Witness Printer took 79.14 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: 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: 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: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 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 - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 57 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.6s, OverallIterations: 19, TraceHistogramMax: 5, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 488 SDtfs, 1586 SDslu, 1178 SDs, 0 SdLazy, 6251 SolverSat, 317 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 679 GetRequests, 344 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 80 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 896 NumberOfCodeBlocks, 896 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 867 ConstructedInterpolants, 44 QuantifiedInterpolants, 278362 SizeOfPredicates, 86 NumberOfNonLiveVariables, 1597 ConjunctsInSsa, 307 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 221/754 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...