./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.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/rec_strlen-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 05:51:35,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:51:35,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:51:35,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:51:35,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:51:35,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:51:35,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:51:35,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:51:35,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:51:35,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:51:35,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:51:35,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:51:35,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:51:35,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:51:35,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:51:35,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:51:35,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:51:35,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:51:35,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:51:35,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:51:35,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:51:35,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:51:35,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:51:35,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:51:35,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:51:35,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:51:35,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:51:35,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:51:35,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:51:35,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:51:35,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:51:35,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:51:35,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:51:35,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:51:35,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:51:35,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:51:35,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:51:35,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:51:35,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:51:35,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:51:35,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:51:35,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 05:51:35,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:51:35,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:51:35,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:51:35,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:51:35,693 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:51:35,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:51:35,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:51:35,693 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:51:35,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:51:35,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:51:35,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:51:35,695 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:51:35,696 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:51:35,696 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:51:35,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:51:35,696 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:51:35,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:51:35,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:51:35,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:51:35,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:51:35,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:51:35,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:51:35,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:51:35,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:51:35,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:51:35,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 05:51:35,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 05:51:35,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:51:35,700 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 -> 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf [2020-10-20 05:51:35,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:51:35,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:51:35,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:51:35,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:51:35,941 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:51:35,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2020-10-20 05:51:36,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0848809/3375730102f44bc8bf7c573b105d5cc9/FLAG4cd93783f [2020-10-20 05:51:36,617 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:51:36,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2020-10-20 05:51:36,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0848809/3375730102f44bc8bf7c573b105d5cc9/FLAG4cd93783f [2020-10-20 05:51:36,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0848809/3375730102f44bc8bf7c573b105d5cc9 [2020-10-20 05:51:36,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:51:36,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:51:36,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:51:36,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:51:36,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:51:36,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:51:36" (1/1) ... [2020-10-20 05:51:36,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2c955e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:36, skipping insertion in model container [2020-10-20 05:51:36,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:51:36" (1/1) ... [2020-10-20 05:51:36,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:51:36,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:51:37,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:51:37,310 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:51:37,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:51:37,427 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:51:37,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37 WrapperNode [2020-10-20 05:51:37,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:51:37,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:51:37,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:51:37,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:51:37,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (1/1) ... [2020-10-20 05:51:37,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:51:37,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:51:37,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:51:37,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:51:37,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (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 [2020-10-20 05:51:37,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:51:37,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:51:37,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 05:51:37,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 05:51:37,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 05:51:37,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 05:51:37,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 05:51:37,559 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2020-10-20 05:51:37,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:51:37,560 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 05:51:37,560 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 05:51:37,560 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 05:51:37,561 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 05:51:37,561 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 05:51:37,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 05:51:37,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 05:51:37,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 05:51:37,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 05:51:37,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 05:51:37,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 05:51:37,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 05:51:37,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 05:51:37,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 05:51:37,563 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 05:51:37,563 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 05:51:37,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 05:51:37,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 05:51:37,564 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 05:51:37,564 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 05:51:37,564 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 05:51:37,564 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 05:51:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 05:51:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 05:51:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 05:51:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 05:51:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 05:51:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 05:51:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 05:51:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 05:51:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 05:51:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 05:51:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 05:51:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 05:51:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 05:51:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 05:51:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 05:51:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 05:51:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 05:51:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 05:51:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 05:51:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 05:51:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 05:51:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 05:51:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 05:51:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 05:51:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 05:51:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 05:51:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 05:51:37,570 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 05:51:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 05:51:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 05:51:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 05:51:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 05:51:37,571 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 05:51:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 05:51:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 05:51:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 05:51:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 05:51:37,572 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 05:51:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 05:51:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 05:51:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 05:51:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 05:51:37,573 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 05:51:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 05:51:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 05:51:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 05:51:37,574 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 05:51:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 05:51:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 05:51:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 05:51:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 05:51:37,575 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 05:51:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 05:51:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 05:51:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 05:51:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 05:51:37,576 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 05:51:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 05:51:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 05:51:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 05:51:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 05:51:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 05:51:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 05:51:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 05:51:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 05:51:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 05:51:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 05:51:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 05:51:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 05:51:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 05:51:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 05:51:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 05:51:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 05:51:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 05:51:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 05:51:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 05:51:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 05:51:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 05:51:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 05:51:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 05:51:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 05:51:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 05:51:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 05:51:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 05:51:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 05:51:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 05:51:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-20 05:51:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2020-10-20 05:51:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 05:51:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:51:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 05:51:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 05:51:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:51:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:51:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:51:38,079 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:51:38,079 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 05:51:38,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:51:38 BoogieIcfgContainer [2020-10-20 05:51:38,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:51:38,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:51:38,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:51:38,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:51:38,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:51:36" (1/3) ... [2020-10-20 05:51:38,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e4186e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:51:38, skipping insertion in model container [2020-10-20 05:51:38,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:37" (2/3) ... [2020-10-20 05:51:38,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e4186e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:51:38, skipping insertion in model container [2020-10-20 05:51:38,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:51:38" (3/3) ... [2020-10-20 05:51:38,092 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca-1.i [2020-10-20 05:51:38,105 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:51:38,114 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-10-20 05:51:38,129 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-20 05:51:38,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:51:38,153 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:51:38,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:51:38,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:51:38,155 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:51:38,155 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:51:38,155 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:51:38,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:51:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 05:51:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:51:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:38,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:38,201 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754822, now seen corresponding path program 1 times [2020-10-20 05:51:38,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:38,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668917446] [2020-10-20 05:51:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:38,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:38,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668917446] [2020-10-20 05:51:38,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:38,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:51:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912856779] [2020-10-20 05:51:38,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:51:38,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:51:38,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:51:38,453 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-20 05:51:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:38,627 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-20 05:51:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:51:38,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 05:51:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:38,641 INFO L225 Difference]: With dead ends: 31 [2020-10-20 05:51:38,642 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 05:51:38,644 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 [2020-10-20 05:51:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 05:51:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 05:51:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 05:51:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-20 05:51:38,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 10 [2020-10-20 05:51:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:38,692 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-20 05:51:38,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:51:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-20 05:51:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:51:38,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:38,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:38,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 05:51:38,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:38,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:38,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754821, now seen corresponding path program 1 times [2020-10-20 05:51:38,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:38,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746682470] [2020-10-20 05:51:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:38,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:38,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746682470] [2020-10-20 05:51:38,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:38,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190246578] [2020-10-20 05:51:38,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:38,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:38,790 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-20 05:51:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:38,897 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-20 05:51:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:51:38,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 05:51:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:38,899 INFO L225 Difference]: With dead ends: 27 [2020-10-20 05:51:38,900 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 05:51:38,901 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 [2020-10-20 05:51:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 05:51:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 05:51:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 05:51:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-20 05:51:38,906 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-10-20 05:51:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:38,907 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-20 05:51:38,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-20 05:51:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:51:38,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:38,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:38,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 05:51:38,909 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754768, now seen corresponding path program 1 times [2020-10-20 05:51:38,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:38,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245479421] [2020-10-20 05:51:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:38,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:38,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245479421] [2020-10-20 05:51:38,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:38,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:51:38,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806697764] [2020-10-20 05:51:38,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:38,968 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-20 05:51:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:39,066 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-20 05:51:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:51:39,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 05:51:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:39,068 INFO L225 Difference]: With dead ends: 34 [2020-10-20 05:51:39,069 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 05:51:39,069 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 [2020-10-20 05:51:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 05:51:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-20 05:51:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 05:51:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-20 05:51:39,078 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2020-10-20 05:51:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:39,078 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-20 05:51:39,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-20 05:51:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:51:39,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:39,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:39,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 05:51:39,080 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2117695186, now seen corresponding path program 1 times [2020-10-20 05:51:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:39,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218280028] [2020-10-20 05:51:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:39,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218280028] [2020-10-20 05:51:39,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:39,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494452886] [2020-10-20 05:51:39,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:39,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:39,147 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-20 05:51:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:39,263 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-20 05:51:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:39,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 05:51:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:39,265 INFO L225 Difference]: With dead ends: 38 [2020-10-20 05:51:39,265 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 05:51:39,266 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 [2020-10-20 05:51:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 05:51:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-20 05:51:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 05:51:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-20 05:51:39,271 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 10 [2020-10-20 05:51:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:39,272 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-20 05:51:39,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-20 05:51:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 05:51:39,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:39,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:39,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 05:51:39,274 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:39,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263901, now seen corresponding path program 1 times [2020-10-20 05:51:39,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:39,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583200062] [2020-10-20 05:51:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:39,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583200062] [2020-10-20 05:51:39,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:39,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:51:39,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377229073] [2020-10-20 05:51:39,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:51:39,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:39,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:51:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:51:39,337 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-10-20 05:51:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:39,454 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-20 05:51:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:39,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-20 05:51:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:39,456 INFO L225 Difference]: With dead ends: 30 [2020-10-20 05:51:39,456 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 05:51:39,457 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 [2020-10-20 05:51:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 05:51:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 05:51:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 05:51:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-20 05:51:39,462 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 13 [2020-10-20 05:51:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:39,462 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-20 05:51:39,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:51:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-20 05:51:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 05:51:39,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:39,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:39,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 05:51:39,464 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263900, now seen corresponding path program 1 times [2020-10-20 05:51:39,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:39,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345992277] [2020-10-20 05:51:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:39,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345992277] [2020-10-20 05:51:39,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:39,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 05:51:39,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847007060] [2020-10-20 05:51:39,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:51:39,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:51:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:51:39,553 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-20 05:51:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:39,716 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-20 05:51:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:51:39,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-20 05:51:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:39,718 INFO L225 Difference]: With dead ends: 37 [2020-10-20 05:51:39,718 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 05:51:39,719 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 [2020-10-20 05:51:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 05:51:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-20 05:51:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 05:51:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-20 05:51:39,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2020-10-20 05:51:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:39,725 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-20 05:51:39,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:51:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-20 05:51:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 05:51:39,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:39,726 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:39,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 05:51:39,727 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1143813903, now seen corresponding path program 1 times [2020-10-20 05:51:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:39,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014852478] [2020-10-20 05:51:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:39,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014852478] [2020-10-20 05:51:39,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439468965] [2020-10-20 05:51:39,804 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 [2020-10-20 05:51:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 05:51:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:39,999 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 [2020-10-20 05:51:40,000 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:40,008 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:40,009 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:40,009 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-20 05:51:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:40,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:40,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-20 05:51:40,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897030045] [2020-10-20 05:51:40,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:51:40,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:51:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:51:40,084 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-20 05:51:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:40,200 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-20 05:51:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:40,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-20 05:51:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:40,202 INFO L225 Difference]: With dead ends: 43 [2020-10-20 05:51:40,203 INFO L226 Difference]: Without dead ends: 43 [2020-10-20 05:51:40,203 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 [2020-10-20 05:51:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-20 05:51:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-20 05:51:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 05:51:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-20 05:51:40,210 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-10-20 05:51:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:40,210 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-20 05:51:40,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:51:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-20 05:51:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:51:40,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:40,212 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:40,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 05:51:40,427 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:40,428 INFO L82 PathProgramCache]: Analyzing trace with hash 228211982, now seen corresponding path program 1 times [2020-10-20 05:51:40,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:40,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346929794] [2020-10-20 05:51:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:40,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:40,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346929794] [2020-10-20 05:51:40,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:40,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-20 05:51:40,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403683013] [2020-10-20 05:51:40,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 05:51:40,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 05:51:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:51:40,630 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-20 05:51:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:40,801 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-20 05:51:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:51:40,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-20 05:51:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:40,802 INFO L225 Difference]: With dead ends: 44 [2020-10-20 05:51:40,803 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 05:51:40,803 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 [2020-10-20 05:51:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 05:51:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-20 05:51:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 05:51:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-20 05:51:40,809 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2020-10-20 05:51:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:40,809 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-20 05:51:40,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 05:51:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-20 05:51:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:51:40,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:40,810 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:40,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 05:51:40,811 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash 929276560, now seen corresponding path program 1 times [2020-10-20 05:51:40,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:40,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331815056] [2020-10-20 05:51:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:40,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:40,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331815056] [2020-10-20 05:51:40,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:40,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-20 05:51:40,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996520704] [2020-10-20 05:51:40,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 05:51:40,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:40,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 05:51:40,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:51:40,998 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2020-10-20 05:51:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:41,229 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-20 05:51:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 05:51:41,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-20 05:51:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:41,232 INFO L225 Difference]: With dead ends: 55 [2020-10-20 05:51:41,233 INFO L226 Difference]: Without dead ends: 55 [2020-10-20 05:51:41,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-20 05:51:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-20 05:51:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-20 05:51:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 05:51:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-20 05:51:41,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2020-10-20 05:51:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:41,239 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-20 05:51:41,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 05:51:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-20 05:51:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 05:51:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:41,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:41,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 05:51:41,241 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1516451273, now seen corresponding path program 1 times [2020-10-20 05:51:41,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:41,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093114163] [2020-10-20 05:51:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:41,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 05:51:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:41,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093114163] [2020-10-20 05:51:41,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:41,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:41,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876365064] [2020-10-20 05:51:41,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:41,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:41,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:41,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:41,320 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 5 states. [2020-10-20 05:51:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:41,373 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-20 05:51:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:51:41,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-20 05:51:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:41,374 INFO L225 Difference]: With dead ends: 41 [2020-10-20 05:51:41,374 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 05:51:41,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 05:51:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-20 05:51:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 05:51:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-20 05:51:41,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-20 05:51:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:41,378 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-20 05:51:41,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-20 05:51:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 05:51:41,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:41,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:41,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 05:51:41,379 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1650962797, now seen corresponding path program 1 times [2020-10-20 05:51:41,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:41,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912102873] [2020-10-20 05:51:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:41,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:41,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912102873] [2020-10-20 05:51:41,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412342261] [2020-10-20 05:51:41,494 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 [2020-10-20 05:51:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 05:51:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:41,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:41,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-10-20 05:51:41,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414769445] [2020-10-20 05:51:41,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 05:51:41,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:41,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 05:51:41,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:51:41,700 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 15 states. [2020-10-20 05:51:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:41,938 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-20 05:51:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 05:51:41,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-10-20 05:51:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:41,947 INFO L225 Difference]: With dead ends: 31 [2020-10-20 05:51:41,947 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 05:51:41,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-20 05:51:41,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 05:51:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-20 05:51:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 05:51:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-20 05:51:41,951 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-10-20 05:51:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:41,951 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-20 05:51:41,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 05:51:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-20 05:51:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 05:51:41,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:41,953 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:42,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:51:42,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1692198505, now seen corresponding path program 2 times [2020-10-20 05:51:42,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:42,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495023606] [2020-10-20 05:51:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495023606] [2020-10-20 05:51:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127958012] [2020-10-20 05:51:42,430 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 [2020-10-20 05:51:42,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 05:51:42,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:51:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-20 05:51:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:42,578 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 [2020-10-20 05:51:42,578 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:42,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:42,587 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. [2020-10-20 05:51:42,587 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-10-20 05:51:42,987 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:42,988 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 18 treesize of output 18 [2020-10-20 05:51:42,988 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 05:51:43,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:43,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 05:51:43,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 05:51:43,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 05:51:43,023 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:43,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:31 [2020-10-20 05:51:43,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 05:51:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:43,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:43,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-10-20 05:51:43,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210549399] [2020-10-20 05:51:43,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-20 05:51:43,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-20 05:51:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-20 05:51:43,200 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 25 states. [2020-10-20 05:51:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:48,725 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-10-20 05:51:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 05:51:48,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-10-20 05:51:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:48,727 INFO L225 Difference]: With dead ends: 48 [2020-10-20 05:51:48,727 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 05:51:48,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2020-10-20 05:51:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 05:51:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-20 05:51:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 05:51:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-20 05:51:48,741 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2020-10-20 05:51:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:48,742 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-20 05:51:48,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-20 05:51:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-20 05:51:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 05:51:48,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:48,745 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:48,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 05:51:48,946 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:48,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1867118562, now seen corresponding path program 3 times [2020-10-20 05:51:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:48,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767774156] [2020-10-20 05:51:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:49,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:49,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767774156] [2020-10-20 05:51:49,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133400614] [2020-10-20 05:51:49,239 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 [2020-10-20 05:51:49,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 05:51:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:51:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-20 05:51:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:49,486 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 [2020-10-20 05:51:49,486 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:49,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:49,493 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. [2020-10-20 05:51:49,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-10-20 05:51:49,662 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 [2020-10-20 05:51:49,662 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:49,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:49,665 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:49,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-20 05:51:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:49,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:49,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2020-10-20 05:51:49,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142399916] [2020-10-20 05:51:49,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-20 05:51:49,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:49,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 05:51:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-20 05:51:49,670 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 24 states. [2020-10-20 05:51:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:50,335 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-20 05:51:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 05:51:50,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-20 05:51:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:50,337 INFO L225 Difference]: With dead ends: 54 [2020-10-20 05:51:50,337 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 05:51:50,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2020-10-20 05:51:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 05:51:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-20 05:51:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 05:51:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-20 05:51:50,343 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-10-20 05:51:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:50,343 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-20 05:51:50,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-20 05:51:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-20 05:51:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 05:51:50,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:50,345 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:50,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:51:50,553 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash 545438971, now seen corresponding path program 4 times [2020-10-20 05:51:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:50,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888008205] [2020-10-20 05:51:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:50,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:50,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888008205] [2020-10-20 05:51:50,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138321052] [2020-10-20 05:51:50,796 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 [2020-10-20 05:51:50,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 05:51:50,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:51:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-20 05:51:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:50,912 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 [2020-10-20 05:51:50,912 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:50,919 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:50,920 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:50,920 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-20 05:51:50,987 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 [2020-10-20 05:51:50,988 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:50,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:50,996 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:50,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-10-20 05:51:51,308 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:51,308 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 19 treesize of output 19 [2020-10-20 05:51:51,309 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 05:51:51,319 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:51,319 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:51,320 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-10-20 05:51:51,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 05:51:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:51,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:51,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2020-10-20 05:51:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110490254] [2020-10-20 05:51:51,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-20 05:51:51,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-20 05:51:51,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-10-20 05:51:51,532 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 29 states. [2020-10-20 05:51:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:52,656 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-20 05:51:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 05:51:52,659 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-20 05:51:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:52,660 INFO L225 Difference]: With dead ends: 44 [2020-10-20 05:51:52,660 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 05:51:52,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-20 05:51:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 05:51:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-20 05:51:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 05:51:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-20 05:51:52,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-10-20 05:51:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:52,665 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-20 05:51:52,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-20 05:51:52,665 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-20 05:51:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-20 05:51:52,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:52,667 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:52,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 05:51:52,876 INFO L429 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1989258789, now seen corresponding path program 5 times [2020-10-20 05:51:52,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:52,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669766885] [2020-10-20 05:51:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:53,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669766885] [2020-10-20 05:51:53,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108907643] [2020-10-20 05:51:53,247 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 [2020-10-20 05:51:53,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-20 05:51:53,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:51:53,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjunts are in the unsatisfiable core [2020-10-20 05:51:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:53,376 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 [2020-10-20 05:51:53,377 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:53,393 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:53,393 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:53,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-20 05:51:53,535 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 [2020-10-20 05:51:53,535 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:53,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:53,543 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:53,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-10-20 05:51:53,994 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:53,994 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 19 treesize of output 19 [2020-10-20 05:51:53,995 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 05:51:54,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:54,007 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:54,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-10-20 05:51:54,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 05:51:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:54,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:54,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-10-20 05:51:54,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50604789] [2020-10-20 05:51:54,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-20 05:51:54,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-20 05:51:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 05:51:54,247 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-10-20 05:51:56,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:56,584 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-20 05:51:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-20 05:51:56,585 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-10-20 05:51:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:56,586 INFO L225 Difference]: With dead ends: 72 [2020-10-20 05:51:56,586 INFO L226 Difference]: Without dead ends: 55 [2020-10-20 05:51:56,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=293, Invalid=3997, Unknown=0, NotChecked=0, Total=4290 [2020-10-20 05:51:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-20 05:51:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-20 05:51:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-20 05:51:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-20 05:51:56,593 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41 [2020-10-20 05:51:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:56,593 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-20 05:51:56,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-20 05:51:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-20 05:51:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-20 05:51:56,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:56,595 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:56,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:51:56,802 INFO L429 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-20 05:51:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1584706644, now seen corresponding path program 6 times [2020-10-20 05:51:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:56,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127779884] [2020-10-20 05:51:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:57,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127779884] [2020-10-20 05:51:57,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946157316] [2020-10-20 05:51:57,242 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 [2020-10-20 05:51:57,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-20 05:51:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:51:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-20 05:51:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:57,364 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 [2020-10-20 05:51:57,364 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:57,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:57,368 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:57,368 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-20 05:51:57,411 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 [2020-10-20 05:51:57,412 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:57,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:57,417 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. [2020-10-20 05:51:57,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-10-20 05:51:57,647 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:57,648 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 [2020-10-20 05:51:57,648 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 05:51:57,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:57,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 05:51:57,664 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:57,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2020-10-20 05:51:57,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 05:51:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-20 05:51:57,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:57,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2020-10-20 05:51:57,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681205515] [2020-10-20 05:51:57,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-20 05:51:57,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-20 05:51:57,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-20 05:51:57,879 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 30 states. [2020-10-20 05:52:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:01,026 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-20 05:52:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-20 05:52:01,026 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-10-20 05:52:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:01,027 INFO L225 Difference]: With dead ends: 77 [2020-10-20 05:52:01,027 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 05:52:01,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=452, Invalid=3838, Unknown=0, NotChecked=0, Total=4290 [2020-10-20 05:52:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 05:52:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 05:52:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 05:52:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 05:52:01,030 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-10-20 05:52:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:01,030 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 05:52:01,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-20 05:52:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 05:52:01,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 05:52:01,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 05:52:01,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:52:01 BoogieIcfgContainer [2020-10-20 05:52:01,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 05:52:01,238 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 05:52:01,238 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 05:52:01,238 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 05:52:01,239 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:51:38" (3/4) ... [2020-10-20 05:52:01,243 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 05:52:01,250 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 05:52:01,250 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-10-20 05:52:01,250 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-10-20 05:52:01,251 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-10-20 05:52:01,251 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-10-20 05:52:01,251 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 05:52:01,251 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec [2020-10-20 05:52:01,251 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-10-20 05:52:01,256 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-20 05:52:01,256 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 05:52:01,257 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 05:52:01,257 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 05:52:01,306 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 05:52:01,306 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 05:52:01,308 INFO L168 Benchmark]: Toolchain (without parser) took 24433.97 ms. Allocated memory was 35.7 MB in the beginning and 116.9 MB in the end (delta: 81.3 MB). Free memory was 14.9 MB in the beginning and 51.9 MB in the end (delta: -37.0 MB). Peak memory consumption was 44.3 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,310 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 34.1 MB. Free memory was 10.0 MB in the beginning and 9.9 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 548.63 ms. Allocated memory was 35.7 MB in the beginning and 46.1 MB in the end (delta: 10.5 MB). Free memory was 14.0 MB in the beginning and 28.0 MB in the end (delta: -13.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,311 INFO L168 Benchmark]: Boogie Preprocessor took 57.83 ms. Allocated memory is still 46.1 MB. Free memory was 28.0 MB in the beginning and 25.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,311 INFO L168 Benchmark]: RCFGBuilder took 594.39 ms. Allocated memory was 46.1 MB in the beginning and 46.7 MB in the end (delta: 524.3 kB). Free memory was 25.4 MB in the beginning and 15.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,312 INFO L168 Benchmark]: TraceAbstraction took 23154.37 ms. Allocated memory was 46.7 MB in the beginning and 116.9 MB in the end (delta: 70.3 MB). Free memory was 15.6 MB in the beginning and 55.4 MB in the end (delta: -39.8 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,312 INFO L168 Benchmark]: Witness Printer took 68.26 ms. Allocated memory is still 116.9 MB. Free memory was 55.4 MB in the beginning and 51.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:01,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 34.1 MB. Free memory was 10.0 MB in the beginning and 9.9 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 548.63 ms. Allocated memory was 35.7 MB in the beginning and 46.1 MB in the end (delta: 10.5 MB). Free memory was 14.0 MB in the beginning and 28.0 MB in the end (delta: -13.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 57.83 ms. Allocated memory is still 46.1 MB. Free memory was 28.0 MB in the beginning and 25.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 594.39 ms. Allocated memory was 46.1 MB in the beginning and 46.7 MB in the end (delta: 524.3 kB). Free memory was 25.4 MB in the beginning and 15.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 23154.37 ms. Allocated memory was 46.7 MB in the beginning and 116.9 MB in the end (delta: 70.3 MB). Free memory was 15.6 MB in the beginning and 55.4 MB in the end (delta: -39.8 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.3 GB. * Witness Printer took 68.26 ms. Allocated memory is still 116.9 MB. Free memory was 55.4 MB in the beginning and 51.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.0s, OverallIterations: 16, TraceHistogramMax: 6, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 299 SDtfs, 652 SDslu, 1075 SDs, 0 SdLazy, 4383 SolverSat, 179 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=15, 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, 16 MinimizatonAttempts, 59 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 558 NumberOfCodeBlocks, 554 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 535 ConstructedInterpolants, 31 QuantifiedInterpolants, 147813 SizeOfPredicates, 72 NumberOfNonLiveVariables, 893 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 23 InterpolantComputations, 9 PerfectInterpolantSequences, 126/396 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...