./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 23:12:43,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:12:43,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:12:43,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:12:43,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:12:43,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:12:43,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:12:43,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:12:43,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:12:43,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:12:43,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:12:43,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:12:43,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:12:43,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:12:43,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:12:43,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:12:43,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:12:43,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:12:43,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:12:43,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:12:43,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:12:43,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:12:43,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:12:43,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:12:43,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:12:43,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:12:43,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:12:43,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:12:43,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:12:43,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:12:43,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:12:43,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:12:43,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:12:43,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:12:43,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:12:43,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:12:43,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:12:43,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:12:43,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:12:43,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:12:43,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:12:43,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:12:43,516 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:12:43,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:12:43,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:12:43,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:12:43,519 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:12:43,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:12:43,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:12:43,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:12:43,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:12:43,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:12:43,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:12:43,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:12:43,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:12:43,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:12:43,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:12:43,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:12:43,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:12:43,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:12:43,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:12:43,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:12:43,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:12:43,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:12:43,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:12:43,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:12:43,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:12:43,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:12:43,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:12:43,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:12:43,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:12:43,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2020-10-25 23:12:44,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:12:44,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:12:44,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:12:44,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:12:44,040 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:12:44,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-25 23:12:44,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6d27e8f/2e521a4a49814961ad7af923f381fdbf/FLAGead55e328 [2020-10-25 23:12:44,751 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:12:44,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-25 23:12:44,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6d27e8f/2e521a4a49814961ad7af923f381fdbf/FLAGead55e328 [2020-10-25 23:12:45,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6d27e8f/2e521a4a49814961ad7af923f381fdbf [2020-10-25 23:12:45,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:12:45,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:12:45,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:12:45,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:12:45,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:12:45,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5bd36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45, skipping insertion in model container [2020-10-25 23:12:45,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:12:45,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:12:45,295 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-25 23:12:45,297 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-25 23:12:45,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:12:45,328 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:12:45,349 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-25 23:12:45,350 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-25 23:12:45,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:12:45,398 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:12:45,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45 WrapperNode [2020-10-25 23:12:45,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:12:45,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:12:45,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:12:45,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:12:45,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:12:45,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:12:45,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:12:45,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:12:45,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... [2020-10-25 23:12:45,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:12:45,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:12:45,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:12:45,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:12:45,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:12:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 23:12:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:12:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-25 23:12:45,600 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-25 23:12:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 23:12:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-25 23:12:45,601 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-25 23:12:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 23:12:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 23:12:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-25 23:12:45,601 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-25 23:12:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:12:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 23:12:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-25 23:12:45,602 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-25 23:12:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:12:45,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:12:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-25 23:12:45,602 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-25 23:12:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 23:12:46,338 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:12:46,339 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-25 23:12:46,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:46 BoogieIcfgContainer [2020-10-25 23:12:46,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:12:46,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:12:46,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:12:46,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:12:46,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:12:45" (1/3) ... [2020-10-25 23:12:46,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12894788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:12:46, skipping insertion in model container [2020-10-25 23:12:46,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:45" (2/3) ... [2020-10-25 23:12:46,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12894788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:12:46, skipping insertion in model container [2020-10-25 23:12:46,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:46" (3/3) ... [2020-10-25 23:12:46,357 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-25 23:12:46,371 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:12:46,379 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-25 23:12:46,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-25 23:12:46,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:12:46,435 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:12:46,435 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:12:46,435 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:12:46,435 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:12:46,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:12:46,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:12:46,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:12:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-10-25 23:12:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-25 23:12:46,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:46,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:46,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1705108219, now seen corresponding path program 1 times [2020-10-25 23:12:46,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:46,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298155167] [2020-10-25 23:12:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:46,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:46,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-25 23:12:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:46,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-25 23:12:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:46,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-25 23:12:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:12:46,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298155167] [2020-10-25 23:12:46,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:12:46,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-25 23:12:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54267116] [2020-10-25 23:12:46,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 23:12:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 23:12:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-25 23:12:46,888 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 7 states. [2020-10-25 23:12:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:47,309 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2020-10-25 23:12:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 23:12:47,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-25 23:12:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:47,323 INFO L225 Difference]: With dead ends: 152 [2020-10-25 23:12:47,324 INFO L226 Difference]: Without dead ends: 84 [2020-10-25 23:12:47,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-25 23:12:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-25 23:12:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-10-25 23:12:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-25 23:12:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-10-25 23:12:47,418 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 30 [2020-10-25 23:12:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:47,423 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-10-25 23:12:47,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 23:12:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-10-25 23:12:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-25 23:12:47,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:47,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:47,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:12:47,434 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2043852858, now seen corresponding path program 1 times [2020-10-25 23:12:47,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:47,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320804034] [2020-10-25 23:12:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-25 23:12:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-25 23:12:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-25 23:12:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-25 23:12:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-25 23:12:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320804034] [2020-10-25 23:12:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469715180] [2020-10-25 23:12:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-25 23:12:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-25 23:12:47,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:47,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-10-25 23:12:47,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890969123] [2020-10-25 23:12:47,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 23:12:47,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 23:12:47,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:12:47,983 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 10 states. [2020-10-25 23:12:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:48,431 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2020-10-25 23:12:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 23:12:48,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-25 23:12:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:48,435 INFO L225 Difference]: With dead ends: 143 [2020-10-25 23:12:48,435 INFO L226 Difference]: Without dead ends: 84 [2020-10-25 23:12:48,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:12:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-25 23:12:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-25 23:12:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-25 23:12:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-10-25 23:12:48,454 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 42 [2020-10-25 23:12:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:48,454 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-10-25 23:12:48,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 23:12:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-10-25 23:12:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-25 23:12:48,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:48,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:48,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 23:12:48,673 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 130958985, now seen corresponding path program 1 times [2020-10-25 23:12:48,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:48,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722658958] [2020-10-25 23:12:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-25 23:12:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-25 23:12:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-25 23:12:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:12:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-25 23:12:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-25 23:12:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-25 23:12:48,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722658958] [2020-10-25 23:12:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:12:48,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-25 23:12:48,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291799019] [2020-10-25 23:12:48,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 23:12:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 23:12:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:12:48,916 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 10 states. [2020-10-25 23:12:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:49,371 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2020-10-25 23:12:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 23:12:49,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-25 23:12:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:49,375 INFO L225 Difference]: With dead ends: 143 [2020-10-25 23:12:49,375 INFO L226 Difference]: Without dead ends: 86 [2020-10-25 23:12:49,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:12:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-25 23:12:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-25 23:12:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-25 23:12:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-10-25 23:12:49,392 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2020-10-25 23:12:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:49,392 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-10-25 23:12:49,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 23:12:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-10-25 23:12:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-25 23:12:49,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:49,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:49,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 23:12:49,396 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash 748985290, now seen corresponding path program 1 times [2020-10-25 23:12:49,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:49,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754452978] [2020-10-25 23:12:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-25 23:12:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-25 23:12:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-25 23:12:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-25 23:12:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-25 23:12:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-25 23:12:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-25 23:12:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-25 23:12:49,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754452978] [2020-10-25 23:12:49,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641267313] [2020-10-25 23:12:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-25 23:12:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-25 23:12:49,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:49,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-25 23:12:49,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116507555] [2020-10-25 23:12:49,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 23:12:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 23:12:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:12:49,972 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 14 states. [2020-10-25 23:12:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:50,654 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2020-10-25 23:12:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-25 23:12:50,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-25 23:12:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:50,659 INFO L225 Difference]: With dead ends: 136 [2020-10-25 23:12:50,659 INFO L226 Difference]: Without dead ends: 86 [2020-10-25 23:12:50,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-25 23:12:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-25 23:12:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-25 23:12:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-25 23:12:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-25 23:12:50,675 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 65 [2020-10-25 23:12:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:50,675 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-25 23:12:50,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 23:12:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-25 23:12:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-25 23:12:50,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:50,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:50,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:50,893 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:50,895 INFO L82 PathProgramCache]: Analyzing trace with hash -912424147, now seen corresponding path program 1 times [2020-10-25 23:12:50,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:50,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247278132] [2020-10-25 23:12:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:12:50,964 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:12:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:12:51,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:12:51,090 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 23:12:51,091 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 23:12:51,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 23:12:51,139 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,140 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,141 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,141 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,142 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,143 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,143 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,143 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,144 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,144 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,144 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,145 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:12:51 BoogieIcfgContainer [2020-10-25 23:12:51,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:12:51,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:12:51,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:12:51,216 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:12:51,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:46" (3/4) ... [2020-10-25 23:12:51,219 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 23:12:51,226 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,226 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,227 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,227 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,228 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,228 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,229 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,229 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,229 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,229 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,230 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,230 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-10-25 23:12:51,339 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:12:51,340 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:12:51,344 INFO L168 Benchmark]: Toolchain (without parser) took 6271.07 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 33.7 MB in the beginning and 52.3 MB in the end (delta: -18.6 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,346 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 39.8 MB. Free memory was 24.1 MB in the beginning and 24.1 MB in the end (delta: 23.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:51,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.25 ms. Allocated memory is still 50.3 MB. Free memory was 33.1 MB in the beginning and 32.9 MB in the end (delta: 201.1 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,348 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.99 ms. Allocated memory is still 50.3 MB. Free memory was 32.9 MB in the beginning and 31.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,348 INFO L168 Benchmark]: Boogie Preprocessor took 54.19 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 29.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,349 INFO L168 Benchmark]: RCFGBuilder took 811.32 ms. Allocated memory is still 50.3 MB. Free memory was 29.1 MB in the beginning and 21.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,351 INFO L168 Benchmark]: TraceAbstraction took 4872.49 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 20.6 MB in the beginning and 58.6 MB in the end (delta: -37.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,352 INFO L168 Benchmark]: Witness Printer took 124.67 ms. Allocated memory is still 107.0 MB. Free memory was 58.6 MB in the beginning and 52.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:51,354 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 39.8 MB. Free memory was 24.1 MB in the beginning and 24.1 MB in the end (delta: 23.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.25 ms. Allocated memory is still 50.3 MB. Free memory was 33.1 MB in the beginning and 32.9 MB in the end (delta: 201.1 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.99 ms. Allocated memory is still 50.3 MB. Free memory was 32.9 MB in the beginning and 31.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.19 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 29.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 811.32 ms. Allocated memory is still 50.3 MB. Free memory was 29.1 MB in the beginning and 21.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4872.49 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 20.6 MB in the beginning and 58.6 MB in the end (delta: -37.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * Witness Printer took 124.67 ms. Allocated memory is still 107.0 MB. Free memory was 58.6 MB in the beginning and 52.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L102] RET nondet_tree() [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L9] COND FALSE !(!cond) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) [L85] x[0] [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 87 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 316 SDtfs, 332 SDslu, 1413 SDs, 0 SdLazy, 1098 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 49914 SizeOfPredicates, 17 NumberOfNonLiveVariables, 593 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 103/111 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! Received shutdown request...