./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/960521-1_1-1.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 978f701fee046cd9a3f43bfb12d114d1876d2f10 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:24:16,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:24:16,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:24:16,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:24:16,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:24:16,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:24:16,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:24:16,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:24:16,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:24:16,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:24:16,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:24:16,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:24:16,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:24:16,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:24:16,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:24:16,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:24:16,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:24:16,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:24:16,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:24:16,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:24:16,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:24:16,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:24:16,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:24:16,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:24:16,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:24:16,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:24:16,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:24:16,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:24:16,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:24:16,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:24:16,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:24:16,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:24:16,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:24:16,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:24:16,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:24:16,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:24:16,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:24:16,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:24:16,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:24:16,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:24:16,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:24:16,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:24:16,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:24:16,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:24:16,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:24:16,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:24:16,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:24:16,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:24:16,563 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:24:16,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:24:16,563 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:24:16,563 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:24:16,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:24:16,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:24:16,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:24:16,564 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:24:16,564 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:24:16,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:24:16,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:24:16,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:24:16,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:24:16,565 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:24:16,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:24:16,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:24:16,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:24:16,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:24:16,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:24:16,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:24:16,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:24:16,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:24:16,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:24:16,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2021-08-30 17:24:17,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:24:17,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:24:17,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:24:17,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:24:17,166 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:24:17,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-08-30 17:24:17,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32309e998/378c31923cfa4ae1b3d8445d903e02b5/FLAG399ef04da [2021-08-30 17:24:17,639 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:24:17,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-08-30 17:24:17,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32309e998/378c31923cfa4ae1b3d8445d903e02b5/FLAG399ef04da [2021-08-30 17:24:18,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32309e998/378c31923cfa4ae1b3d8445d903e02b5 [2021-08-30 17:24:18,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:24:18,007 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:24:18,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:24:18,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:24:18,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:24:18,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5a8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18, skipping insertion in model container [2021-08-30 17:24:18,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:24:18,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:24:18,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:24:18,292 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:24:18,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:24:18,350 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:24:18,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18 WrapperNode [2021-08-30 17:24:18,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:24:18,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:24:18,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:24:18,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:24:18,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:24:18,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:24:18,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:24:18,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:24:18,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (1/1) ... [2021-08-30 17:24:18,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:24:18,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:24:18,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 17:24:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 17:24:18,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:24:18,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:24:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:24:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:24:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:24:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:24:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:24:18,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:24:18,499 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-30 17:24:18,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:24:18,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:24:18,500 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:24:18,501 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:24:18,502 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:24:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:24:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:24:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:24:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:24:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:24:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:24:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:24:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:24:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:24:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:24:18,505 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:24:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:24:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:24:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:24:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:24:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:24:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:24:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:24:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:24:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:24:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:24:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:24:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:24:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:24:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:24:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:24:18,510 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:24:18,510 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:24:18,510 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:24:18,510 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:24:18,510 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:24:18,510 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:24:18,511 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:24:18,512 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:24:18,513 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:24:18,514 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:24:18,514 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:24:18,514 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:24:18,514 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:24:18,514 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:24:18,514 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:24:18,515 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:24:18,515 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:24:18,515 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:24:18,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:24:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-30 17:24:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:24:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:24:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:24:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:24:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:24:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:24:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 17:24:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:24:18,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:24:18,810 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 17:24:18,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:24:18 BoogieIcfgContainer [2021-08-30 17:24:18,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:24:18,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:24:18,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:24:18,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:24:18,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:24:18" (1/3) ... [2021-08-30 17:24:18,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc48f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:24:18, skipping insertion in model container [2021-08-30 17:24:18,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:24:18" (2/3) ... [2021-08-30 17:24:18,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc48f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:24:18, skipping insertion in model container [2021-08-30 17:24:18,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:24:18" (3/3) ... [2021-08-30 17:24:18,816 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-08-30 17:24:18,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:24:18,820 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-08-30 17:24:18,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:24:18,850 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 17:24:18,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-08-30 17:24:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:24:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:24:18,864 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:18,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:18,865 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:18,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-08-30 17:24:18,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:18,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63631479] [2021-08-30 17:24:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:18,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:19,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63631479] [2021-08-30 17:24:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63631479] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:19,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:24:19,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:24:19,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481105123] [2021-08-30 17:24:19,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 17:24:19,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 17:24:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:24:19,084 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:19,215 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-30 17:24:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:24:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:24:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:19,223 INFO L225 Difference]: With dead ends: 62 [2021-08-30 17:24:19,225 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 17:24:19,226 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.53ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:24:19,230 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.82ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:19,231 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 106 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 112.82ms Time] [2021-08-30 17:24:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 17:24:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-30 17:24:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-30 17:24:19,258 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-08-30 17:24:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:19,259 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-30 17:24:19,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-30 17:24:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:24:19,260 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:19,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:19,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:24:19,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-08-30 17:24:19,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:19,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732666751] [2021-08-30 17:24:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:19,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:19,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:19,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732666751] [2021-08-30 17:24:19,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732666751] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:19,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:24:19,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:24:19,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808651442] [2021-08-30 17:24:19,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:24:19,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:24:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:24:19,396 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:19,573 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-08-30 17:24:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:24:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:24:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:19,575 INFO L225 Difference]: With dead ends: 111 [2021-08-30 17:24:19,575 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:24:19,576 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.64ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:24:19,576 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.79ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:19,577 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 14 Invalid, 221 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 144.79ms Time] [2021-08-30 17:24:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:24:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-08-30 17:24:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-08-30 17:24:19,582 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-08-30 17:24:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:19,582 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-08-30 17:24:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-08-30 17:24:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:24:19,583 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:19,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:19,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:24:19,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:19,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-08-30 17:24:19,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:19,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523215445] [2021-08-30 17:24:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:19,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:19,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:19,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523215445] [2021-08-30 17:24:19,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523215445] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:19,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:24:19,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:24:19,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558484594] [2021-08-30 17:24:19,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:24:19,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:24:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:24:19,644 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:19,749 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-30 17:24:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:24:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:24:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:19,753 INFO L225 Difference]: With dead ends: 62 [2021-08-30 17:24:19,753 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 17:24:19,753 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.33ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:24:19,761 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.40ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:19,763 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 154 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 87.40ms Time] [2021-08-30 17:24:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 17:24:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-30 17:24:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-08-30 17:24:19,772 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-08-30 17:24:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:19,772 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-08-30 17:24:19,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-08-30 17:24:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 17:24:19,774 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:19,774 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:19,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:24:19,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-08-30 17:24:19,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:19,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158216900] [2021-08-30 17:24:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:19,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:19,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:19,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158216900] [2021-08-30 17:24:19,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158216900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:24:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555211724] [2021-08-30 17:24:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:19,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:19,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:24:19,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:24:19,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 17:24:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:24:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:24:20,077 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:24:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-08-30 17:24:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:20,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:24:20,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555211724] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:20,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:24:20,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-08-30 17:24:20,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747672543] [2021-08-30 17:24:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:24:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:24:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:24:20,122 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:20,302 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-08-30 17:24:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:24:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 17:24:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:20,305 INFO L225 Difference]: With dead ends: 108 [2021-08-30 17:24:20,305 INFO L226 Difference]: Without dead ends: 108 [2021-08-30 17:24:20,306 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.99ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:24:20,313 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 104 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.42ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:20,313 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 17 Invalid, 270 Unknown, 0 Unchecked, 3.66ms Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 148.42ms Time] [2021-08-30 17:24:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-30 17:24:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-08-30 17:24:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-30 17:24:20,321 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-08-30 17:24:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:20,321 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-30 17:24:20,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-30 17:24:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:24:20,321 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:20,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:20,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 17:24:20,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:20,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-08-30 17:24:20,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:20,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986139836] [2021-08-30 17:24:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:20,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:20,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:20,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:20,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986139836] [2021-08-30 17:24:20,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986139836] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:20,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:24:20,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:24:20,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283776984] [2021-08-30 17:24:20,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:24:20,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:24:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:24:20,591 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:20,692 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-08-30 17:24:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:24:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 17:24:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:20,695 INFO L225 Difference]: With dead ends: 54 [2021-08-30 17:24:20,695 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:24:20,695 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.94ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:24:20,696 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.47ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:20,696 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 142 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 73.47ms Time] [2021-08-30 17:24:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:24:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 17:24:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-30 17:24:20,712 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-08-30 17:24:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:20,712 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-30 17:24:20,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-30 17:24:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:24:20,712 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:20,712 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:20,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:24:20,713 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-08-30 17:24:20,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:20,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907844089] [2021-08-30 17:24:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:20,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:20,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:20,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:20,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907844089] [2021-08-30 17:24:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907844089] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:20,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:24:20,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:24:20,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202465110] [2021-08-30 17:24:20,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:24:20,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:24:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:24:20,816 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:21,043 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-08-30 17:24:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:24:21,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 17:24:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:21,044 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:24:21,044 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:24:21,045 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.93ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:24:21,045 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.93ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:21,045 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 357 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [15 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 160.93ms Time] [2021-08-30 17:24:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:24:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-08-30 17:24:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 66 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:24:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-08-30 17:24:21,048 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-08-30 17:24:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:21,048 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-08-30 17:24:21,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-08-30 17:24:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 17:24:21,049 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:21,049 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:21,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 17:24:21,049 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-08-30 17:24:21,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:21,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684861884] [2021-08-30 17:24:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:21,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:21,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:21,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:21,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684861884] [2021-08-30 17:24:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684861884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:24:21,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226039176] [2021-08-30 17:24:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:21,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:21,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:24:21,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:24:21,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 17:24:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:24:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:24:21,276 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:24:21,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-08-30 17:24:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:21,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:24:21,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226039176] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:21,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:24:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-30 17:24:21,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432246553] [2021-08-30 17:24:21,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:24:21,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:24:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:24:21,372 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:21,538 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-30 17:24:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:24:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 17:24:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:21,538 INFO L225 Difference]: With dead ends: 104 [2021-08-30 17:24:21,539 INFO L226 Difference]: Without dead ends: 104 [2021-08-30 17:24:21,539 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.82ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:24:21,539 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 138 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.61ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:21,539 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [13 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 139.61ms Time] [2021-08-30 17:24:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-30 17:24:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-08-30 17:24:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.4) internal successors, (70), 64 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:24:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-08-30 17:24:21,542 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-08-30 17:24:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:21,542 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-08-30 17:24:21,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-08-30 17:24:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 17:24:21,543 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:21,543 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:21,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:24:21,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-30 17:24:21,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-08-30 17:24:21,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:21,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548201162] [2021-08-30 17:24:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:21,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:21,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:21,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548201162] [2021-08-30 17:24:21,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548201162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:24:21,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793094217] [2021-08-30 17:24:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:21,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:24:21,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:24:21,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 17:24:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:21,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 17:24:21,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:24:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:21,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:24:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793094217] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:21,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:24:21,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-08-30 17:24:21,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978457412] [2021-08-30 17:24:21,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:24:21,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:24:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:24:21,938 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:22,026 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-08-30 17:24:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:24:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-30 17:24:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:22,027 INFO L225 Difference]: With dead ends: 97 [2021-08-30 17:24:22,027 INFO L226 Difference]: Without dead ends: 97 [2021-08-30 17:24:22,027 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 33.45ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:24:22,028 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.31ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:22,028 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 9 Invalid, 146 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 84.31ms Time] [2021-08-30 17:24:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-30 17:24:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-08-30 17:24:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:24:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-08-30 17:24:22,031 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-08-30 17:24:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:22,031 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-08-30 17:24:22,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-08-30 17:24:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 17:24:22,031 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:22,031 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:22,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 17:24:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:22,245 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-08-30 17:24:22,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:22,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139544532] [2021-08-30 17:24:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:22,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:22,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:22,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:22,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139544532] [2021-08-30 17:24:22,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139544532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:24:22,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439718863] [2021-08-30 17:24:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:22,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:22,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:24:22,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:24:22,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 17:24:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:24:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:24:22,462 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:24:22,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-08-30 17:24:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:22,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:24:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:24:22,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439718863] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:24:22,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:24:22,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-08-30 17:24:22,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61778586] [2021-08-30 17:24:22,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 17:24:22,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 17:24:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:24:22,696 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:23,310 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-08-30 17:24:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 17:24:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-30 17:24:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:23,312 INFO L225 Difference]: With dead ends: 112 [2021-08-30 17:24:23,312 INFO L226 Difference]: Without dead ends: 112 [2021-08-30 17:24:23,313 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 435.68ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-30 17:24:23,313 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 206 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 246.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 293.80ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:23,313 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 28 Invalid, 739 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [37 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 293.80ms Time] [2021-08-30 17:24:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-30 17:24:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-08-30 17:24:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:24:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-08-30 17:24:23,316 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-08-30 17:24:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-08-30 17:24:23,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:24:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-08-30 17:24:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:24:23,316 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:23,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:23,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 17:24:23,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:24:23,521 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-08-30 17:24:23,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:23,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535880366] [2021-08-30 17:24:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:23,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:23,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:24:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:23,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 17:24:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:24:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:24:23,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:24:23,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535880366] [2021-08-30 17:24:23,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535880366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:24:23,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:24:23,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:24:23,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230128093] [2021-08-30 17:24:23,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:24:23,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:24:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:24:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:24:23,571 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:24:23,721 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-08-30 17:24:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:24:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-08-30 17:24:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:24:23,722 INFO L225 Difference]: With dead ends: 71 [2021-08-30 17:24:23,722 INFO L226 Difference]: Without dead ends: 71 [2021-08-30 17:24:23,723 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.13ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:24:23,723 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.39ms IncrementalHoareTripleChecker+Time [2021-08-30 17:24:23,723 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 11 Invalid, 207 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 87.39ms Time] [2021-08-30 17:24:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-30 17:24:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-30 17:24:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:24:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-08-30 17:24:23,725 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-08-30 17:24:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:24:23,725 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-08-30 17:24:23,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:24:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-08-30 17:24:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:24:23,726 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:24:23,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:24:23,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 17:24:23,726 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:24:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:24:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-08-30 17:24:23,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:24:23,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824031400] [2021-08-30 17:24:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:24:23,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:24:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:24:23,735 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:24:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:24:23,762 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 17:24:23,763 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:24:23,763 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr3REQUIRES_VIOLATION (20 of 21 remaining) [2021-08-30 17:24:23,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (19 of 21 remaining) [2021-08-30 17:24:23,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (18 of 21 remaining) [2021-08-30 17:24:23,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (17 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE (16 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE (15 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE (14 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE (13 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE (12 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE (11 of 21 remaining) [2021-08-30 17:24:23,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE (10 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE (9 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK (4 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION (3 of 21 remaining) [2021-08-30 17:24:23,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION (2 of 21 remaining) [2021-08-30 17:24:23,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION (1 of 21 remaining) [2021-08-30 17:24:23,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION (0 of 21 remaining) [2021-08-30 17:24:23,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 17:24:23,771 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:24:23,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:24:23 BoogieIcfgContainer [2021-08-30 17:24:23,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:24:23,812 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:24:23,812 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:24:23,812 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:24:23,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:24:18" (3/4) ... [2021-08-30 17:24:23,814 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 17:24:23,838 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:24:23,838 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:24:23,838 INFO L158 Benchmark]: Toolchain (without parser) took 5831.71ms. Allocated memory was 62.9MB in the beginning and 92.3MB in the end (delta: 29.4MB). Free memory was 42.2MB in the beginning and 41.4MB in the end (delta: 883.7kB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. [2021-08-30 17:24:23,839 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 45.0MB in the beginning and 44.9MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:24:23,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.08ms. Allocated memory is still 62.9MB. Free memory was 42.0MB in the beginning and 40.2MB in the end (delta: 1.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-30 17:24:23,839 INFO L158 Benchmark]: Boogie Preprocessor took 68.80ms. Allocated memory is still 62.9MB. Free memory was 40.2MB in the beginning and 37.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:24:23,839 INFO L158 Benchmark]: RCFGBuilder took 389.39ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 37.6MB in the beginning and 48.5MB in the end (delta: -10.9MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2021-08-30 17:24:23,840 INFO L158 Benchmark]: TraceAbstraction took 4998.73ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 47.9MB in the beginning and 43.5MB in the end (delta: 4.5MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2021-08-30 17:24:23,840 INFO L158 Benchmark]: Witness Printer took 26.33ms. Allocated memory is still 92.3MB. Free memory was 43.5MB in the beginning and 41.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:24:23,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 45.0MB in the beginning and 44.9MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.08ms. Allocated memory is still 62.9MB. Free memory was 42.0MB in the beginning and 40.2MB in the end (delta: 1.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.80ms. Allocated memory is still 62.9MB. Free memory was 40.2MB in the beginning and 37.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 389.39ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 37.6MB in the beginning and 48.5MB in the end (delta: -10.9MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4998.73ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 47.9MB in the beginning and 43.5MB in the end (delta: 4.5MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. * Witness Printer took 26.33ms. Allocated memory is still 92.3MB. Free memory was 43.5MB in the beginning and 41.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=57, \old(a)=52, \old(b)=55, \old(b)=54, \old(n)=50, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 4924.45ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 12.04ms, AutomataDifference: 2033.72ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 6.37ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 765 SdHoareTripleChecker+Valid, 1332.94ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 758 mSDsluCounter, 148 SdHoareTripleChecker+Invalid, 1063.43ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 879 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2540 IncrementalHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 54 mSDtfsCounter, 2540 mSolverCounterSat, 22.78ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 951.44ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 63.68ms AutomataMinimizationTime, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 46.79ms SsaConstructionTime, 192.34ms SatisfiabilityAnalysisTime, 1322.58ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 220 ConstructedInterpolants, 0 QuantifiedInterpolants, 1620 SizeOfPredicates, 9 NumberOfNonLiveVariables, 618 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 15 InterpolantComputations, 9 PerfectInterpolantSequences, 12/25 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 incorrect! [2021-08-30 17:24:23,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...