./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 42b3e156f78fe4fcf6b35cfd49f93ee3220cf061 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 10:52:14,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:52:14,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:52:14,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:52:14,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:52:14,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:52:14,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:52:14,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:52:14,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:52:14,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:52:14,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:52:14,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:52:14,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:52:14,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:52:14,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:52:14,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:52:14,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:52:14,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:52:14,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:52:14,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:52:14,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:52:14,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:52:14,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:52:14,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:52:14,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:52:14,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:52:14,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:52:14,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:52:14,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:52:14,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:52:14,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:52:14,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:52:14,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:52:14,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:52:14,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:52:14,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:52:14,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:52:14,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:52:14,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:52:14,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:52:14,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:52:14,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 10:52:14,729 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:52:14,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:52:14,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:52:14,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:52:14,730 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:52:14,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:52:14,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:52:14,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:52:14,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:52:14,732 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:52:14,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:52:14,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:52:14,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:52:14,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:52:14,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:52:14,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:52:14,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:52:14,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer 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(__VERIFIER_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 -> 42b3e156f78fe4fcf6b35cfd49f93ee3220cf061 [2019-12-07 10:52:14,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:52:14,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:52:14,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:52:14,866 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:52:14,866 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:52:14,867 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2019-12-07 10:52:14,907 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/data/04f5d19d5/af1388e32cc04f87a98028946bab65b7/FLAG0bdb60818 [2019-12-07 10:52:15,329 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:52:15,329 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/sv-benchmarks/c/verifythis/tree_del_rec.c [2019-12-07 10:52:15,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/data/04f5d19d5/af1388e32cc04f87a98028946bab65b7/FLAG0bdb60818 [2019-12-07 10:52:15,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/data/04f5d19d5/af1388e32cc04f87a98028946bab65b7 [2019-12-07 10:52:15,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:52:15,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:52:15,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:52:15,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:52:15,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:52:15,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f9858b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15, skipping insertion in model container [2019-12-07 10:52:15,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:52:15,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:52:15,523 WARN L1484 CHandler]: Possible shadowing of function min [2019-12-07 10:52:15,524 WARN L1484 CHandler]: Possible shadowing of function min [2019-12-07 10:52:15,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:52:15,545 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:52:15,557 WARN L1484 CHandler]: Possible shadowing of function min [2019-12-07 10:52:15,558 WARN L1484 CHandler]: Possible shadowing of function min [2019-12-07 10:52:15,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:52:15,579 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:52:15,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15 WrapperNode [2019-12-07 10:52:15,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:52:15,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:52:15,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:52:15,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:52:15,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:52:15,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:52:15,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:52:15,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:52:15,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... [2019-12-07 10:52:15,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:52:15,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:52:15,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:52:15,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:52:15,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:52:15,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 10:52:15,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 10:52:15,678 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2019-12-07 10:52:15,678 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2019-12-07 10:52:15,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure min [2019-12-07 10:52:15,679 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2019-12-07 10:52:15,679 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure size [2019-12-07 10:52:15,679 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2019-12-07 10:52:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:52:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:52:15,680 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2019-12-07 10:52:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2019-12-07 10:52:15,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 10:52:15,944 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:52:15,945 INFO L287 CfgBuilder]: Removed 19 assume(true) statements. [2019-12-07 10:52:15,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:52:15 BoogieIcfgContainer [2019-12-07 10:52:15,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:52:15,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:52:15,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:52:15,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:52:15,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:52:15" (1/3) ... [2019-12-07 10:52:15,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fd85be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:52:15, skipping insertion in model container [2019-12-07 10:52:15,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:52:15" (2/3) ... [2019-12-07 10:52:15,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fd85be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:52:15, skipping insertion in model container [2019-12-07 10:52:15,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:52:15" (3/3) ... [2019-12-07 10:52:15,951 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2019-12-07 10:52:15,958 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:52:15,963 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 10:52:15,970 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 10:52:15,988 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:52:15,988 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:52:15,989 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:52:15,989 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:52:15,989 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:52:15,989 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:52:15,989 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:52:15,989 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:52:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2019-12-07 10:52:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 10:52:16,011 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:52:16,011 INFO L410 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] [2019-12-07 10:52:16,012 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:52:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:52:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash 443879088, now seen corresponding path program 1 times [2019-12-07 10:52:16,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:52:16,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751941988] [2019-12-07 10:52:16,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:52:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:52:16,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751941988] [2019-12-07 10:52:16,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:52:16,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 10:52:16,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184304665] [2019-12-07 10:52:16,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:52:16,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:52:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:52:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:52:16,238 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 6 states. [2019-12-07 10:52:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:52:16,443 INFO L93 Difference]: Finished difference Result 143 states and 188 transitions. [2019-12-07 10:52:16,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:52:16,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-12-07 10:52:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:52:16,452 INFO L225 Difference]: With dead ends: 143 [2019-12-07 10:52:16,453 INFO L226 Difference]: Without dead ends: 82 [2019-12-07 10:52:16,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:52:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-07 10:52:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2019-12-07 10:52:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-07 10:52:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2019-12-07 10:52:16,492 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 28 [2019-12-07 10:52:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:52:16,492 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2019-12-07 10:52:16,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:52:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2019-12-07 10:52:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 10:52:16,494 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:52:16,494 INFO L410 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] [2019-12-07 10:52:16,494 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:52:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:52:16,495 INFO L82 PathProgramCache]: Analyzing trace with hash 703147165, now seen corresponding path program 1 times [2019-12-07 10:52:16,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:52:16,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876522252] [2019-12-07 10:52:16,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:52:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 10:52:16,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876522252] [2019-12-07 10:52:16,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688814689] [2019-12-07 10:52:16,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:52:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:16,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 10:52:16,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:52:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 10:52:16,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:52:16,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2019-12-07 10:52:16,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137653337] [2019-12-07 10:52:16,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 10:52:16,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:52:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 10:52:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:52:16,750 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 11 states. [2019-12-07 10:52:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:52:17,072 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2019-12-07 10:52:17,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 10:52:17,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2019-12-07 10:52:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:52:17,075 INFO L225 Difference]: With dead ends: 139 [2019-12-07 10:52:17,075 INFO L226 Difference]: Without dead ends: 82 [2019-12-07 10:52:17,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-12-07 10:52:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-07 10:52:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2019-12-07 10:52:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-07 10:52:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2019-12-07 10:52:17,087 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 40 [2019-12-07 10:52:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:52:17,087 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2019-12-07 10:52:17,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 10:52:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2019-12-07 10:52:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 10:52:17,089 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:52:17,089 INFO L410 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] [2019-12-07 10:52:17,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:52:17,291 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:52:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:52:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash -211106208, now seen corresponding path program 1 times [2019-12-07 10:52:17,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:52:17,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199872778] [2019-12-07 10:52:17,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:52:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 10:52:17,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199872778] [2019-12-07 10:52:17,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:52:17,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-12-07 10:52:17,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829175854] [2019-12-07 10:52:17,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 10:52:17,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:52:17,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 10:52:17,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:52:17,450 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 10 states. [2019-12-07 10:52:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:52:17,702 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2019-12-07 10:52:17,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 10:52:17,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2019-12-07 10:52:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:52:17,704 INFO L225 Difference]: With dead ends: 139 [2019-12-07 10:52:17,704 INFO L226 Difference]: Without dead ends: 84 [2019-12-07 10:52:17,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-12-07 10:52:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-07 10:52:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-12-07 10:52:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-07 10:52:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2019-12-07 10:52:17,713 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 50 [2019-12-07 10:52:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:52:17,714 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2019-12-07 10:52:17,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 10:52:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2019-12-07 10:52:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 10:52:17,716 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:52:17,716 INFO L410 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] [2019-12-07 10:52:17,716 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:52:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:52:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1318085877, now seen corresponding path program 1 times [2019-12-07 10:52:17,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:52:17,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614925035] [2019-12-07 10:52:17,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:52:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-12-07 10:52:17,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614925035] [2019-12-07 10:52:17,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367362708] [2019-12-07 10:52:17,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:52:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:52:17,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 10:52:17,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:52:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-12-07 10:52:18,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:52:18,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 17 [2019-12-07 10:52:18,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027252218] [2019-12-07 10:52:18,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 10:52:18,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:52:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 10:52:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-12-07 10:52:18,029 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand 8 states. [2019-12-07 10:52:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:52:18,114 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2019-12-07 10:52:18,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 10:52:18,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2019-12-07 10:52:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:52:18,116 INFO L225 Difference]: With dead ends: 133 [2019-12-07 10:52:18,116 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 10:52:18,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-12-07 10:52:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 10:52:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-07 10:52:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 10:52:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2019-12-07 10:52:18,125 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 63 [2019-12-07 10:52:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:52:18,125 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2019-12-07 10:52:18,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 10:52:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2019-12-07 10:52:18,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 10:52:18,128 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:52:18,128 INFO L410 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] [2019-12-07 10:52:18,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:52:18,329 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:52:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:52:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1932588882, now seen corresponding path program 1 times [2019-12-07 10:52:18,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:52:18,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765851776] [2019-12-07 10:52:18,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:52:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:52:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:52:18,459 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:52:18,459 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 10:52:18,478 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,479 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,479 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,480 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,482 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,482 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,482 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,483 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,483 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,483 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,483 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,483 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:52:18 BoogieIcfgContainer [2019-12-07 10:52:18,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 10:52:18,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:52:18,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:52:18,507 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:52:18,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:52:15" (3/4) ... [2019-12-07 10:52:18,509 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 10:52:18,512 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,513 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,513 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,513 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,514 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,515 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2019-12-07 10:52:18,561 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d263afc6-d416-461e-afd6-8b241a81d471/bin/uautomizer/witness.graphml [2019-12-07 10:52:18,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:52:18,562 INFO L168 Benchmark]: Toolchain (without parser) took 3217.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 944.8 MB in the beginning and 888.3 MB in the end (delta: 56.4 MB). Peak memory consumption was 146.6 MB. Max. memory is 11.5 GB. [2019-12-07 10:52:18,563 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:52:18,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -140.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:52:18,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:52:18,563 INFO L168 Benchmark]: Boogie Preprocessor took 25.79 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:52:18,564 INFO L168 Benchmark]: RCFGBuilder took 309.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 11.5 GB. [2019-12-07 10:52:18,564 INFO L168 Benchmark]: TraceAbstraction took 2560.37 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 895.2 MB in the end (delta: 144.5 MB). Peak memory consumption was 144.5 MB. Max. memory is 11.5 GB. [2019-12-07 10:52:18,564 INFO L168 Benchmark]: Witness Printer took 53.86 ms. Allocated memory is still 1.1 GB. Free memory was 895.2 MB in the beginning and 888.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 10:52:18,566 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 234.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -140.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.79 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 309.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2560.37 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 895.2 MB in the end (delta: 144.5 MB). Peak memory consumption was 144.5 MB. Max. memory is 11.5 GB. * Witness Printer took 53.86 ms. Allocated memory is still 1.1 GB. Free memory was 895.2 MB in the beginning and 888.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L97] 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}] [L97] RET nondet_tree() [L73] CALL, EXPR min(t) VAL [n={1:0}] [L32] COND FALSE !(!n) [L35] EXPR n->data [L35] int a = n->data; [L36] EXPR n->left VAL [a=2147483647, n={1:0}, n={1:0}, n->left={0:0}] [L36] CALL, EXPR min(n->left) VAL [n={0:0}] [L32] COND TRUE !n [L33] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L36] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={1:0}, n={1:0}, n->left={0:0}] [L36] int b = min(n->left); [L37] EXPR n->right VAL [a=2147483647, b=2147483647, n={1:0}, n={1:0}, n->right={0:0}] [L37] CALL, EXPR min(n->right) VAL [n={0:0}] [L32] COND TRUE !n [L33] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L37] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={1:0}, n={1:0}, n->right={0:0}] [L37] int c = min(n->right); [L38] COND TRUE b <= a && b <= c [L38] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={1:0}, n={1:0}] [L73] RET, EXPR min(t) [L73] int a = min(t); [L74] int b; [L76] CALL, EXPR size(t) VAL [t={1:0}] [L68] COND FALSE !(!t) [L69] EXPR t->left VAL [t={1:0}, t={1:0}, t->left={0:0}] [L69] CALL, EXPR size(t->left) VAL [t={0:0}] [L68] COND TRUE !t [L68] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L69] RET, EXPR size(t->left) VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}] [L69] EXPR t->right VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}, t->right={0:0}] [L69] CALL, EXPR size(t->right) VAL [t={0:0}] [L68] COND TRUE !t [L68] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L69] 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}] [L69] return size(t->left) + size(t->right) + 1; [L76] RET, EXPR size(t) [L76] int n = size(t); [L78] int *x = calloc(n, sizeof(int)); [L79] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-1:0}, t={1:0}] [L57] COND FALSE !(!t) [L60] EXPR t->left VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={1:0}, t={1:0}, t->left={0:0}] [L60] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, t={0:0}] [L57] COND TRUE !t [L58] return i; VAL [\old(i)=1, \result=1, a={-1:0}, a={-1:0}, i=1, t={0:0}, t={0:0}] [L60] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={1:0}, t={1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L60] i = tree_inorder(t->left, a, i) [L61] EXPR i++ [L61] EXPR t->data [L61] a[i++] = t->data [L62] EXPR t->right VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={1:0}, t={1:0}, t->right={0:0}] [L62] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-1:0}, t={0:0}] [L57] COND TRUE !t [L58] return i; VAL [\old(i)=2, \result=2, a={-1:0}, a={-1:0}, i=2, t={0:0}, t={0:0}] [L62] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={1:0}, t={1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L62] i = tree_inorder(t->right, a, i) [L63] return i; VAL [\old(i)=1, \result=2, a={-1:0}, a={-1:0}, i=2, t={1:0}, t={1:0}] [L79] RET tree_inorder(t, x, n) [L80] x[0] [L11] COND TRUE !cond [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 80 locations, 4 error locations. Result: UNSAFE, OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 321 SDtfs, 236 SDslu, 1337 SDs, 0 SdLazy, 730 SolverSat, 118 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 278 ConstructedInterpolants, 0 QuantifiedInterpolants, 43596 SizeOfPredicates, 13 NumberOfNonLiveVariables, 539 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 105/111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...