./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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_max_incorrect.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 fdb95a531f91b891105aa672579f7a5a4ed687cf .................................................................................................................................................................................................................................................................................................................................................................................................................................. 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.multireach-323-8d31f38 [2021-07-05 10:12:32,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 10:12:32,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 10:12:32,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 10:12:32,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 10:12:32,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 10:12:32,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 10:12:32,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 10:12:32,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 10:12:32,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 10:12:32,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 10:12:32,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 10:12:32,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 10:12:32,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 10:12:32,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 10:12:32,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 10:12:32,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 10:12:32,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 10:12:32,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 10:12:32,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 10:12:32,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 10:12:32,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 10:12:32,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 10:12:32,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 10:12:32,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 10:12:32,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 10:12:32,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 10:12:32,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 10:12:32,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 10:12:32,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 10:12:32,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 10:12:32,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 10:12:32,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 10:12:32,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 10:12:32,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 10:12:32,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 10:12:32,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 10:12:32,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 10:12:32,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 10:12:32,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 10:12:32,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 10:12:32,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 10:12:32,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 10:12:32,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 10:12:32,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 10:12:32,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 10:12:32,656 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 10:12:32,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 10:12:32,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 10:12:32,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 10:12:32,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 10:12:32,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 10:12:32,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 10:12:32,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 10:12:32,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 10:12:32,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 10:12:32,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 10:12:32,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 10:12:32,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 10:12:32,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 10:12:32,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 10:12:32,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 10:12:32,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 10:12:32,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 10:12:32,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 10:12:32,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 10:12:32,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 10:12:32,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 10:12:32,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 10:12:32,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 10:12:32,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdb95a531f91b891105aa672579f7a5a4ed687cf [2021-07-05 10:12:32,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 10:12:32,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 10:12:32,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 10:12:32,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 10:12:32,899 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 10:12:32,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-07-05 10:12:32,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aede93d62/ae1ee08cc2ca42fb9a255e1663f67001/FLAG55c241606 [2021-07-05 10:12:33,299 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 10:12:33,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-07-05 10:12:33,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aede93d62/ae1ee08cc2ca42fb9a255e1663f67001/FLAG55c241606 [2021-07-05 10:12:33,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aede93d62/ae1ee08cc2ca42fb9a255e1663f67001 [2021-07-05 10:12:33,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 10:12:33,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 10:12:33,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 10:12:33,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 10:12:33,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 10:12:33,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7566e9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33, skipping insertion in model container [2021-07-05 10:12:33,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 10:12:33,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 10:12:33,442 WARN L224 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_max_incorrect.c[466,479] [2021-07-05 10:12:33,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 10:12:33,472 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 10:12:33,504 WARN L224 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_max_incorrect.c[466,479] [2021-07-05 10:12:33,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 10:12:33,522 INFO L208 MainTranslator]: Completed translation [2021-07-05 10:12:33,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33 WrapperNode [2021-07-05 10:12:33,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 10:12:33,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 10:12:33,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 10:12:33,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 10:12:33,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 10:12:33,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 10:12:33,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 10:12:33,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 10:12:33,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 10:12:33,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 10:12:33,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 10:12:33,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 10:12:33,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (1/1) ... [2021-07-05 10:12:33,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 10:12:33,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 10:12:33,610 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) [2021-07-05 10:12:33,617 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 [2021-07-05 10:12:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-07-05 10:12:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-07-05 10:12:33,647 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-07-05 10:12:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-07-05 10:12:33,648 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-07-05 10:12:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 10:12:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-07-05 10:12:33,649 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-07-05 10:12:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-07-05 10:12:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 10:12:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-05 10:12:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-05 10:12:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 10:12:33,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 10:12:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-05 10:12:33,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 10:12:33,929 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-05 10:12:33,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 10:12:33 BoogieIcfgContainer [2021-07-05 10:12:33,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 10:12:33,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 10:12:33,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 10:12:33,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 10:12:33,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 10:12:33" (1/3) ... [2021-07-05 10:12:33,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba1e61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 10:12:33, skipping insertion in model container [2021-07-05 10:12:33,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:33" (2/3) ... [2021-07-05 10:12:33,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba1e61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 10:12:33, skipping insertion in model container [2021-07-05 10:12:33,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 10:12:33" (3/3) ... [2021-07-05 10:12:33,935 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2021-07-05 10:12:33,939 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 10:12:33,939 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-05 10:12:33,971 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 10:12:33,981 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 10:12:33,982 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 10:12:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-07-05 10:12:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-05 10:12:33,999 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 10:12:33,999 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 10:12:33,999 INFO L374 AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 10:12:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 10:12:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash -891537794, now seen corresponding path program 1 times [2021-07-05 10:12:34,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 10:12:34,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303932744] [2021-07-05 10:12:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:34,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 10:12:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:34,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:34,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:34,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:34,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-07-05 10:12:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-07-05 10:12:34,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-07-05 10:12:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 10:12:34,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 10:12:34,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303932744] [2021-07-05 10:12:34,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303932744] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 10:12:34,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 10:12:34,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-05 10:12:34,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204787512] [2021-07-05 10:12:34,307 INFO L425 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-05 10:12:34,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 10:12:34,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-05 10:12:34,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-05 10:12:34,316 INFO L87 Difference]: Start difference. First operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-05 10:12:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 10:12:34,680 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2021-07-05 10:12:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-05 10:12:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-07-05 10:12:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 10:12:34,687 INFO L225 Difference]: With dead ends: 73 [2021-07-05 10:12:34,687 INFO L226 Difference]: Without dead ends: 34 [2021-07-05 10:12:34,691 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-05 10:12:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-07-05 10:12:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-07-05 10:12:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-07-05 10:12:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-07-05 10:12:34,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 18 [2021-07-05 10:12:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 10:12:34,724 INFO L442 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-07-05 10:12:34,724 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-05 10:12:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-07-05 10:12:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-05 10:12:34,726 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 10:12:34,726 INFO L525 BasicCegarLoop]: trace histogram [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] [2021-07-05 10:12:34,727 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 10:12:34,727 INFO L374 AbstractCegarLoop]: === Iteration 2 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 10:12:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 10:12:34,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1509693249, now seen corresponding path program 1 times [2021-07-05 10:12:34,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 10:12:34,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042982949] [2021-07-05 10:12:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:34,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 10:12:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:34,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:34,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-07-05 10:12:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:34,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:34,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-07-05 10:12:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-07-05 10:12:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:34,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-07-05 10:12:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:34,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:34,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:34,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-05 10:12:34,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 10:12:34,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042982949] [2021-07-05 10:12:34,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042982949] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 10:12:34,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 10:12:34,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-07-05 10:12:34,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707166634] [2021-07-05 10:12:34,940 INFO L425 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-05 10:12:34,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 10:12:34,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-05 10:12:34,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-05 10:12:34,942 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-07-05 10:12:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 10:12:35,120 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-07-05 10:12:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-05 10:12:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-07-05 10:12:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 10:12:35,123 INFO L225 Difference]: With dead ends: 47 [2021-07-05 10:12:35,123 INFO L226 Difference]: Without dead ends: 36 [2021-07-05 10:12:35,124 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-05 10:12:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-05 10:12:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-07-05 10:12:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-07-05 10:12:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-07-05 10:12:35,136 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 28 [2021-07-05 10:12:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 10:12:35,137 INFO L442 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-07-05 10:12:35,137 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-07-05 10:12:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-07-05 10:12:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-05 10:12:35,139 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 10:12:35,139 INFO L525 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] [2021-07-05 10:12:35,139 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-05 10:12:35,140 INFO L374 AbstractCegarLoop]: === Iteration 3 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 10:12:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 10:12:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash -896236761, now seen corresponding path program 1 times [2021-07-05 10:12:35,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 10:12:35,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018589191] [2021-07-05 10:12:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:35,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 10:12:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 10:12:35,186 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 10:12:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 10:12:35,198 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 10:12:35,215 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-05 10:12:35,215 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-05 10:12:35,217 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-05 10:12:35,217 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 10:12:35,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 10:12:35 BoogieIcfgContainer [2021-07-05 10:12:35,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 10:12:35,243 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 10:12:35,243 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 10:12:35,244 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 10:12:35,244 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 10:12:33" (3/4) ... [2021-07-05 10:12:35,245 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-05 10:12:35,273 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 10:12:35,273 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 10:12:35,274 INFO L168 Benchmark]: Toolchain (without parser) took 1956.50 ms. Allocated memory was 56.6 MB in the beginning and 92.3 MB in the end (delta: 35.7 MB). Free memory was 34.7 MB in the beginning and 46.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:35,274 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 56.6 MB. Free memory is still 36.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 10:12:35,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.66 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 34.5 MB in the beginning and 58.1 MB in the end (delta: -23.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:35,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.98 ms. Allocated memory is still 75.5 MB. Free memory was 58.0 MB in the beginning and 56.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 10:12:35,275 INFO L168 Benchmark]: Boogie Preprocessor took 22.84 ms. Allocated memory is still 75.5 MB. Free memory was 56.6 MB in the beginning and 55.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:35,275 INFO L168 Benchmark]: RCFGBuilder took 351.15 ms. Allocated memory is still 75.5 MB. Free memory was 55.3 MB in the beginning and 56.3 MB in the end (delta: -1.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:35,275 INFO L168 Benchmark]: TraceAbstraction took 1311.89 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 55.7 MB in the beginning and 49.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:35,275 INFO L168 Benchmark]: Witness Printer took 29.48 ms. Allocated memory is still 92.3 MB. Free memory was 49.8 MB in the beginning and 46.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:35,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 56.6 MB. Free memory is still 36.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 203.66 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 34.5 MB in the beginning and 58.1 MB in the end (delta: -23.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.98 ms. Allocated memory is still 75.5 MB. Free memory was 58.0 MB in the beginning and 56.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.84 ms. Allocated memory is still 75.5 MB. Free memory was 56.6 MB in the beginning and 55.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 351.15 ms. Allocated memory is still 75.5 MB. Free memory was 55.3 MB in the beginning and 56.3 MB in the end (delta: -1.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1311.89 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 55.7 MB in the beginning and 49.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. * Witness Printer took 29.48 ms. Allocated memory is still 92.3 MB. Free memory was 49.8 MB in the beginning and 46.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L60] CALL nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L25] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L26] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L26] n->right = nondet_tree() [L27] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L60] RET nondet_tree() [L55] CALL, EXPR max(n) VAL [n={-1:0}] [L32] COND FALSE !(!n) [L35] EXPR n->left VAL [n={-1:0}, n={-1:0}, n->left={0:0}] [L35] CALL, EXPR max(n->left) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L35] RET, EXPR max(n->left) VAL [max(n->left)=-2147483648, n={-1:0}, n={-1:0}, n->left={0:0}] [L35] int a = max(n->left); [L36] EXPR n->right VAL [a=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L36] CALL, EXPR max(n->right) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L36] RET, EXPR max(n->right) VAL [a=-2147483648, max(n->right)=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; VAL [\result=-2147483648, a=-2147483648, b=-2147483648, n={-1:0}, n={-1:0}] [L55] RET, EXPR max(n) [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] n->data [L11] COND TRUE !cond [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: checkErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1249.0ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 10.1ms, AutomataDifference: 566.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 68 SDtfs, 69 SDslu, 223 SDs, 0 SdLazy, 320 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 256.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 291.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 35.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.3ms SsaConstructionTime, 86.7ms SatisfiabilityAnalysisTime, 378.3ms InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 194 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 9/9 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! [2021-07-05 10:12:35,301 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...