./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 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/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 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:34:56,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:34:56,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:34:57,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:34:57,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:34:57,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:34:57,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:34:57,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:34:57,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:34:57,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:34:57,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:34:57,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:34:57,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:34:57,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:34:57,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:34:57,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:34:57,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:34:57,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:34:57,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:34:57,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:34:57,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:34:57,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:34:57,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:34:57,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:34:57,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:34:57,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:34:57,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:34:57,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:34:57,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:34:57,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:34:57,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:34:57,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:34:57,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:34:57,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:34:57,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:34:57,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:34:57,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:34:57,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:34:57,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:34:57,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:34:57,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:34:57,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:34:57,121 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:34:57,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:34:57,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:34:57,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:34:57,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:34:57,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:34:57,124 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:34:57,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:34:57,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:34:57,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:34:57,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:34:57,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:34:57,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:34:57,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:34:57,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:34:57,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:34:57,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:34:57,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:34:57,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:34:57,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:34:57,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:34:57,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:34:57,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:34:57,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:34:57,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:34:57,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:34:57,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:34:57,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:34:57,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:34:57,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:34:57,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-08-29 16:34:57,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:34:57,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:34:57,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:34:57,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:34:57,461 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:34:57,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-29 16:34:57,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a52c07a4e/1496d5f67d22422f9e4ed94a11007f0a/FLAG720919726 [2021-08-29 16:34:57,950 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:34:57,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-29 16:34:57,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a52c07a4e/1496d5f67d22422f9e4ed94a11007f0a/FLAG720919726 [2021-08-29 16:34:58,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a52c07a4e/1496d5f67d22422f9e4ed94a11007f0a [2021-08-29 16:34:58,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:34:58,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:34:58,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:34:58,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:34:58,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:34:58,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a8cb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58, skipping insertion in model container [2021-08-29 16:34:58,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:34:58,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:34:58,490 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-29 16:34:58,502 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-29 16:34:58,504 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-29 16:34:58,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:34:58,538 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:34:58,549 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-29 16:34:58,566 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-29 16:34:58,570 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-29 16:34:58,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:34:58,636 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:34:58,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58 WrapperNode [2021-08-29 16:34:58,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:34:58,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:34:58,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:34:58,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:34:58,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:34:58,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:34:58,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:34:58,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:34:58,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:34:58,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:34:58,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:34:58,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:34:58,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (1/1) ... [2021-08-29 16:34:58,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:34:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:34:58,730 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) [2021-08-29 16:34:58,732 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 [2021-08-29 16:34:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 16:34:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:34:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-08-29 16:34:58,755 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-08-29 16:34:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 16:34:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-08-29 16:34:58,756 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-08-29 16:34:58,756 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-08-29 16:34:58,756 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-08-29 16:34:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:34:58,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:34:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-08-29 16:34:58,757 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-08-29 16:34:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 16:34:59,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:34:59,016 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-08-29 16:34:59,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:34:59 BoogieIcfgContainer [2021-08-29 16:34:59,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:34:59,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:34:59,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:34:59,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:34:59,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:34:58" (1/3) ... [2021-08-29 16:34:59,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333b156c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:34:59, skipping insertion in model container [2021-08-29 16:34:59,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:34:58" (2/3) ... [2021-08-29 16:34:59,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333b156c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:34:59, skipping insertion in model container [2021-08-29 16:34:59,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:34:59" (3/3) ... [2021-08-29 16:34:59,026 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-08-29 16:34:59,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:34:59,032 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-08-29 16:34:59,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:34:59,075 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-08-29 16:34:59,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-29 16:34:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-08-29 16:34:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-29 16:34:59,099 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:59,100 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:34:59,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-29 16:34:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1169561837, now seen corresponding path program 1 times [2021-08-29 16:34:59,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:59,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965069359] [2021-08-29 16:34:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:59,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:34:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:59,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:34:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-29 16:34:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:59,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-29 16:34:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-29 16:34:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:34:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:34:59,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:34:59,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965069359] [2021-08-29 16:34:59,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965069359] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:34:59,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:34:59,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 16:34:59,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283808145] [2021-08-29 16:34:59,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 16:34:59,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:34:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 16:34:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-29 16:34:59,557 INFO L87 Difference]: Start difference. First operand has 83 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-29 16:34:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:34:59,892 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2021-08-29 16:34:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 16:34:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-08-29 16:34:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:34:59,910 INFO L225 Difference]: With dead ends: 149 [2021-08-29 16:34:59,910 INFO L226 Difference]: Without dead ends: 84 [2021-08-29 16:34:59,915 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.99ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-29 16:34:59,919 INFO L928 BasicCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.38ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 272.49ms IncrementalHoareTripleChecker+Time [2021-08-29 16:34:59,922 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 109 Invalid, 397 Unknown, 0 Unchecked, 7.38ms Time], IncrementalHoareTripleChecker [39 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 272.49ms Time] [2021-08-29 16:34:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-29 16:34:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2021-08-29 16:34:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2021-08-29 16:34:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-08-29 16:34:59,984 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 30 [2021-08-29 16:34:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:34:59,984 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-08-29 16:34:59,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-29 16:34:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-08-29 16:34:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-29 16:34:59,988 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:34:59,988 INFO L513 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] [2021-08-29 16:34:59,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:34:59,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-29 16:34:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:34:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 309270478, now seen corresponding path program 1 times [2021-08-29 16:34:59,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:34:59,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256059680] [2021-08-29 16:34:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:34:59,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-29 16:35:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-08-29 16:35:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-29 16:35:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-29 16:35:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:35:00,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:00,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256059680] [2021-08-29 16:35:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256059680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:00,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585134927] [2021-08-29 16:35:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:00,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:00,241 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) [2021-08-29 16:35:00,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:35:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-29 16:35:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:35:00,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:35:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:35:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585134927] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:35:00,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:35:00,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 12 [2021-08-29 16:35:00,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926207041] [2021-08-29 16:35:00,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 16:35:00,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:00,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 16:35:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-29 16:35:00,843 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-29 16:35:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:01,354 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-08-29 16:35:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 16:35:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2021-08-29 16:35:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:01,357 INFO L225 Difference]: With dead ends: 143 [2021-08-29 16:35:01,357 INFO L226 Difference]: Without dead ends: 84 [2021-08-29 16:35:01,358 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 179.91ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-29 16:35:01,360 INFO L928 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 314.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.95ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 386.72ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:01,360 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 164 Invalid, 638 Unknown, 0 Unchecked, 5.95ms Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 386.72ms Time] [2021-08-29 16:35:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-29 16:35:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-08-29 16:35:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 59 states have internal predecessors, (65), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2021-08-29 16:35:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-08-29 16:35:01,372 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 42 [2021-08-29 16:35:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:01,372 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-08-29 16:35:01,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-29 16:35:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-08-29 16:35:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-29 16:35:01,374 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:01,375 INFO L513 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] [2021-08-29 16:35:01,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:01,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:01,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-29 16:35:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:01,594 INFO L82 PathProgramCache]: Analyzing trace with hash 962350225, now seen corresponding path program 1 times [2021-08-29 16:35:01,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:01,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045396504] [2021-08-29 16:35:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:01,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-29 16:35:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-29 16:35:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-29 16:35:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:35:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-29 16:35:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-08-29 16:35:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-29 16:35:01,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:01,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045396504] [2021-08-29 16:35:01,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045396504] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:35:01,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:35:01,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-29 16:35:01,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477115943] [2021-08-29 16:35:01,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 16:35:01,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:01,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 16:35:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-29 16:35:01,751 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-29 16:35:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:02,154 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-08-29 16:35:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:35:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-08-29 16:35:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:02,156 INFO L225 Difference]: With dead ends: 143 [2021-08-29 16:35:02,156 INFO L226 Difference]: Without dead ends: 86 [2021-08-29 16:35:02,157 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.48ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-29 16:35:02,158 INFO L928 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.86ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.36ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:02,159 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 175 Invalid, 568 Unknown, 0 Unchecked, 7.86ms Time], IncrementalHoareTripleChecker [41 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 333.36ms Time] [2021-08-29 16:35:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-29 16:35:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-08-29 16:35:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.2) internal successors, (66), 61 states have internal predecessors, (66), 16 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-08-29 16:35:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2021-08-29 16:35:02,176 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2021-08-29 16:35:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:02,176 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2021-08-29 16:35:02,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-29 16:35:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2021-08-29 16:35:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-29 16:35:02,178 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:02,179 INFO L513 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] [2021-08-29 16:35:02,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 16:35:02,179 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-29 16:35:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -431413566, now seen corresponding path program 1 times [2021-08-29 16:35:02,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:02,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784420758] [2021-08-29 16:35:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:02,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-29 16:35:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-29 16:35:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-29 16:35:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-29 16:35:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-08-29 16:35:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:35:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-29 16:35:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-08-29 16:35:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-29 16:35:02,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:35:02,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784420758] [2021-08-29 16:35:02,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784420758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:35:02,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763007777] [2021-08-29 16:35:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:02,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:35:02,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:35:02,449 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) [2021-08-29 16:35:02,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 16:35:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:35:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 16:35:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:35:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-08-29 16:35:02,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 16:35:02,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763007777] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:35:02,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 16:35:02,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 17 [2021-08-29 16:35:02,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181979599] [2021-08-29 16:35:02,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 16:35:02,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:35:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 16:35:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-08-29 16:35:02,766 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-08-29 16:35:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:35:03,001 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-08-29 16:35:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 16:35:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2021-08-29 16:35:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:35:03,003 INFO L225 Difference]: With dead ends: 135 [2021-08-29 16:35:03,003 INFO L226 Difference]: Without dead ends: 85 [2021-08-29 16:35:03,004 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 140.95ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-29 16:35:03,005 INFO L928 BasicCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.13ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.05ms IncrementalHoareTripleChecker+Time [2021-08-29 16:35:03,005 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 181 Invalid, 426 Unknown, 0 Unchecked, 5.13ms Time], IncrementalHoareTripleChecker [11 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 193.05ms Time] [2021-08-29 16:35:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-29 16:35:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-29 16:35:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 63 states have internal predecessors, (67), 16 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2021-08-29 16:35:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-08-29 16:35:03,014 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 65 [2021-08-29 16:35:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:35:03,015 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-08-29 16:35:03,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-08-29 16:35:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-08-29 16:35:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-29 16:35:03,017 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:35:03,017 INFO L513 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] [2021-08-29 16:35:03,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 16:35:03,233 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,SelfDestructingSolverStorable3 [2021-08-29 16:35:03,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-08-29 16:35:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:35:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1851220005, now seen corresponding path program 1 times [2021-08-29 16:35:03,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:35:03,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725825053] [2021-08-29 16:35:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:35:03,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:35:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:35:03,288 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 16:35:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:35:03,377 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 16:35:03,377 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 16:35:03,378 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-08-29 16:35:03,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2021-08-29 16:35:03,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2021-08-29 16:35:03,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2021-08-29 16:35:03,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 16:35:03,386 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:35:03,413 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,415 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,415 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,415 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,416 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,416 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,416 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,416 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,417 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,417 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,417 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,417 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:35:03 BoogieIcfgContainer [2021-08-29 16:35:03,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:35:03,463 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:35:03,463 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:35:03,464 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:35:03,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:34:59" (3/4) ... [2021-08-29 16:35:03,466 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 16:35:03,470 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,471 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,471 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,471 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,472 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,472 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,472 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,472 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,472 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,473 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,473 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,473 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-08-29 16:35:03,533 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:35:03,533 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:35:03,534 INFO L158 Benchmark]: Toolchain (without parser) took 5182.54ms. Allocated memory was 58.7MB in the beginning and 90.2MB in the end (delta: 31.5MB). Free memory was 37.7MB in the beginning and 53.2MB in the end (delta: -15.4MB). Peak memory consumption was 15.2MB. Max. memory is 16.1GB. [2021-08-29 16:35:03,534 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 41.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:35:03,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.81ms. Allocated memory is still 58.7MB. Free memory was 37.6MB in the beginning and 41.8MB in the end (delta: -4.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 16:35:03,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.69ms. Allocated memory is still 58.7MB. Free memory was 41.8MB in the beginning and 40.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:35:03,536 INFO L158 Benchmark]: Boogie Preprocessor took 32.32ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 38.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:35:03,536 INFO L158 Benchmark]: RCFGBuilder took 314.51ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 38.2MB in the beginning and 51.7MB in the end (delta: -13.5MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-08-29 16:35:03,536 INFO L158 Benchmark]: TraceAbstraction took 4443.25ms. Allocated memory was 71.3MB in the beginning and 90.2MB in the end (delta: 18.9MB). Free memory was 51.4MB in the beginning and 59.5MB in the end (delta: -8.0MB). Peak memory consumption was 41.3MB. Max. memory is 16.1GB. [2021-08-29 16:35:03,537 INFO L158 Benchmark]: Witness Printer took 70.20ms. Allocated memory is still 90.2MB. Free memory was 59.5MB in the beginning and 53.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-29 16:35:03,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 41.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.81ms. Allocated memory is still 58.7MB. Free memory was 37.6MB in the beginning and 41.8MB in the end (delta: -4.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.69ms. Allocated memory is still 58.7MB. Free memory was 41.8MB in the beginning and 40.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.32ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 38.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 314.51ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 38.2MB in the beginning and 51.7MB in the end (delta: -13.5MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4443.25ms. Allocated memory was 71.3MB in the beginning and 90.2MB in the end (delta: 18.9MB). Free memory was 51.4MB in the beginning and 59.5MB in the end (delta: -8.0MB). Peak memory consumption was 41.3MB. Max. memory is 16.1GB. * Witness Printer took 70.20ms. Allocated memory is still 90.2MB. Free memory was 59.5MB in the beginning and 53.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * 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: - 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: 16]: a call to reach_error is reachable a call to reach_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 [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 [n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-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 [L16] reach_error() - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 83 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 4317.03ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 18.84ms, AutomataDifference: 1567.00ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 13.10ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 254 SdHoareTripleChecker+Valid, 1185.63ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 240 mSDsluCounter, 629 SdHoareTripleChecker+Invalid, 951.35ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1437 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1913 IncrementalHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 111 mSDtfsCounter, 1913 mSolverCounterSat, 26.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 460.33ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=4, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 84.51ms AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.98ms SsaConstructionTime, 297.91ms SatisfiabilityAnalysisTime, 1498.11ms InterpolantComputationTime, 373 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 331 ConstructedInterpolants, 0 QuantifiedInterpolants, 1058 SizeOfPredicates, 10 NumberOfNonLiveVariables, 589 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 115/123 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! [2021-08-29 16:35:03,592 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...