/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:50:22,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:22,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:22,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:22,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:22,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:22,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:22,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:22,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:22,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:22,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:22,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:22,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:22,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:22,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:22,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:22,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:22,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:22,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:22,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:22,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:22,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:22,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:22,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:22,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:50:22,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:50:22,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:50:22,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:50:22,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:50:22,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:50:22,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:50:22,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:50:22,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:50:22,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:50:22,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:50:22,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:50:22,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:50:22,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:50:22,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:22,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:22,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:22,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-27 21:50:22,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:22,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:22,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:22,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:22,840 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:22,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:22,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:22,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:22,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:22,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:22,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:22,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:22,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:22,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:22,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:22,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:22,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:22,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:22,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:22,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:22,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:22,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:22,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:22,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:22,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:22,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:22,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:22,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:22,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:22,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:50:23,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:23,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:23,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:23,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:23,375 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:23,376 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-08-27 21:50:23,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f80e5ddd/e7a6122f1fdc496c9e3878110d103d40/FLAG23779f36e [2020-08-27 21:50:24,076 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:24,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-08-27 21:50:24,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f80e5ddd/e7a6122f1fdc496c9e3878110d103d40/FLAG23779f36e [2020-08-27 21:50:24,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f80e5ddd/e7a6122f1fdc496c9e3878110d103d40 [2020-08-27 21:50:24,414 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:24,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:24,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:24,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:24,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:24,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450e3cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24, skipping insertion in model container [2020-08-27 21:50:24,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:24,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:24,716 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-27 21:50:24,718 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-27 21:50:24,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:24,759 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:24,780 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-27 21:50:24,782 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-27 21:50:24,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:24,910 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:24,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24 WrapperNode [2020-08-27 21:50:24,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:24,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:24,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:24,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:24,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... [2020-08-27 21:50:24,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:24,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:24,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:24,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:24,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:25,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:25,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:25,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-27 21:50:25,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-27 21:50:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-27 21:50:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-27 21:50:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-27 21:50:25,061 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-27 21:50:25,062 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-27 21:50:25,062 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-27 21:50:25,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:25,062 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-27 21:50:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-27 21:50:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:50:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:50:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-27 21:50:25,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:50:25,064 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-27 21:50:25,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:25,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-27 21:50:25,064 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-27 21:50:25,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:50:25,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:50:25,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:50:25,065 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-27 21:50:25,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:50:25,065 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-27 21:50:25,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:50:25,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:50:25,066 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-27 21:50:25,066 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-27 21:50:25,066 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-27 21:50:25,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:50:25,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-27 21:50:25,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:25,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:25,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:25,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:25,599 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:50:25,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:25 BoogieIcfgContainer [2020-08-27 21:50:25,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:25,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:25,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:25,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:25,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:24" (1/3) ... [2020-08-27 21:50:25,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c65926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:25, skipping insertion in model container [2020-08-27 21:50:25,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:24" (2/3) ... [2020-08-27 21:50:25,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c65926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:25, skipping insertion in model container [2020-08-27 21:50:25,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:25" (3/3) ... [2020-08-27 21:50:25,616 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-08-27 21:50:25,629 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:25,641 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:25,668 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:25,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:25,700 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:25,700 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:25,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:25,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:25,701 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:25,701 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:25,701 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-08-27 21:50:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-27 21:50:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:25,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:25,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:25,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times [2020-08-27 21:50:25,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:25,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995748470] [2020-08-27 21:50:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 21:50:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-27 21:50:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:50:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-27 21:50:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-27 21:50:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:26,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995748470] [2020-08-27 21:50:26,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:26,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:50:26,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409248471] [2020-08-27 21:50:26,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:50:26,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:50:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:50:26,182 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 6 states. [2020-08-27 21:50:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:26,705 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-08-27 21:50:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:50:26,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-27 21:50:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:26,724 INFO L225 Difference]: With dead ends: 165 [2020-08-27 21:50:26,725 INFO L226 Difference]: Without dead ends: 93 [2020-08-27 21:50:26,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:50:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-27 21:50:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-08-27 21:50:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-27 21:50:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-08-27 21:50:26,806 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44 [2020-08-27 21:50:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:26,807 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-08-27 21:50:26,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:50:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-08-27 21:50:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-27 21:50:26,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:26,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:26,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:26,813 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times [2020-08-27 21:50:26,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:26,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417241570] [2020-08-27 21:50:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 21:50:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:26,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-27 21:50:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:27,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:50:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-27 21:50:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:27,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-27 21:50:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:27,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417241570] [2020-08-27 21:50:27,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:27,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-27 21:50:27,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812425527] [2020-08-27 21:50:27,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:50:27,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:50:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:50:27,121 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states. [2020-08-27 21:50:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:27,900 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2020-08-27 21:50:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:50:27,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-27 21:50:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:27,904 INFO L225 Difference]: With dead ends: 151 [2020-08-27 21:50:27,905 INFO L226 Difference]: Without dead ends: 95 [2020-08-27 21:50:27,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-08-27 21:50:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-27 21:50:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-27 21:50:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-27 21:50:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-27 21:50:27,940 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44 [2020-08-27 21:50:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:27,940 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-27 21:50:27,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:50:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-27 21:50:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-27 21:50:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:27,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:27,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:27,944 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times [2020-08-27 21:50:27,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:27,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465187137] [2020-08-27 21:50:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 21:50:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-27 21:50:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:50:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-27 21:50:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-27 21:50:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-27 21:50:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-27 21:50:28,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465187137] [2020-08-27 21:50:28,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:50:28,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-27 21:50:28,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726714493] [2020-08-27 21:50:28,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:50:28,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:50:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:50:28,261 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 12 states. [2020-08-27 21:50:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:29,165 INFO L93 Difference]: Finished difference Result 161 states and 206 transitions. [2020-08-27 21:50:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:50:29,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-08-27 21:50:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:29,168 INFO L225 Difference]: With dead ends: 161 [2020-08-27 21:50:29,168 INFO L226 Difference]: Without dead ends: 94 [2020-08-27 21:50:29,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-08-27 21:50:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-27 21:50:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-08-27 21:50:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-27 21:50:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-08-27 21:50:29,185 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56 [2020-08-27 21:50:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:29,185 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-08-27 21:50:29,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:50:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-08-27 21:50:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-27 21:50:29,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:29,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:29,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:29,189 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times [2020-08-27 21:50:29,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:29,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171659515] [2020-08-27 21:50:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 21:50:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:50:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:50:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-27 21:50:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-27 21:50:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-27 21:50:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-27 21:50:29,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171659515] [2020-08-27 21:50:29,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:29,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-27 21:50:29,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767005388] [2020-08-27 21:50:29,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:50:29,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:50:29,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:50:29,500 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states. [2020-08-27 21:50:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:30,226 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-08-27 21:50:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-27 21:50:30,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-27 21:50:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:30,235 INFO L225 Difference]: With dead ends: 160 [2020-08-27 21:50:30,235 INFO L226 Difference]: Without dead ends: 96 [2020-08-27 21:50:30,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-08-27 21:50:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-27 21:50:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-08-27 21:50:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-27 21:50:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-08-27 21:50:30,264 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66 [2020-08-27 21:50:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:30,266 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-08-27 21:50:30,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:50:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-08-27 21:50:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-27 21:50:30,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:30,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:30,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:30,269 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times [2020-08-27 21:50:30,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:30,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123993247] [2020-08-27 21:50:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:50:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-27 21:50:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:50:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-27 21:50:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:50:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-27 21:50:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:50:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-27 21:50:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-27 21:50:30,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123993247] [2020-08-27 21:50:30,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:30,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-27 21:50:30,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040030382] [2020-08-27 21:50:30,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:50:30,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:30,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:50:30,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:50:30,590 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states. [2020-08-27 21:50:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:31,393 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2020-08-27 21:50:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-27 21:50:31,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-08-27 21:50:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:31,396 INFO L225 Difference]: With dead ends: 148 [2020-08-27 21:50:31,396 INFO L226 Difference]: Without dead ends: 96 [2020-08-27 21:50:31,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-08-27 21:50:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-27 21:50:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-27 21:50:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-27 21:50:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-08-27 21:50:31,412 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 79 [2020-08-27 21:50:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:31,413 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-08-27 21:50:31,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:50:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-08-27 21:50:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-27 21:50:31,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:31,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:31,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:31,419 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times [2020-08-27 21:50:31,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:31,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130453294] [2020-08-27 21:50:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:50:31,478 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:50:31,478 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:50:31,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:31,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:50:31 BoogieIcfgContainer [2020-08-27 21:50:31,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:50:31,517 INFO L168 Benchmark]: Toolchain (without parser) took 7099.63 ms. Allocated memory was 138.9 MB in the beginning and 291.5 MB in the end (delta: 152.6 MB). Free memory was 101.6 MB in the beginning and 210.0 MB in the end (delta: -108.5 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:31,518 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-27 21:50:31,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.72 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 180.4 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:31,520 INFO L168 Benchmark]: Boogie Preprocessor took 65.19 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 177.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:31,521 INFO L168 Benchmark]: RCFGBuilder took 628.66 ms. Allocated memory is still 202.9 MB. Free memory was 177.6 MB in the beginning and 144.3 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:31,522 INFO L168 Benchmark]: TraceAbstraction took 5906.58 ms. Allocated memory was 202.9 MB in the beginning and 291.5 MB in the end (delta: 88.6 MB). Free memory was 143.6 MB in the beginning and 210.0 MB in the end (delta: -66.4 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:31,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 493.72 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 180.4 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.19 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 177.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 628.66 ms. Allocated memory is still 202.9 MB. Free memory was 177.6 MB in the beginning and 144.3 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5906.58 ms. Allocated memory was 202.9 MB in the beginning and 291.5 MB in the end (delta: 88.6 MB). Free memory was 143.6 MB in the beginning and 210.0 MB in the end (delta: -66.4 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L96] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L28] RET, EXPR nondet_tree() [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L29] RET, EXPR nondet_tree() [L29] n->right = nondet_tree() [L30] return n; [L96] RET, EXPR nondet_tree() [L96] CALL task(nondet_tree()) [L74] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->left [L38] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L38] RET, EXPR min(n->left) [L38] int a = min(n->left); [L39] EXPR n->right [L39] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->right) [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; [L74] RET, EXPR min(t) [L74] int a = min(t); [L75] int b; [L77] CALL, EXPR size(t) [L69] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR size(t->left) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->left) [L70] EXPR t->right [L70] CALL, EXPR size(t->right) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->right) [L70] return size(t->left) + size(t->right) + 1; [L77] RET, EXPR size(t) [L77] int n = size(t); [L78] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L78] RET assume_abort_if_not(n != 0) [L79] EXPR, FCALL calloc(n, sizeof(int)) [L79] int *x = calloc(n, sizeof(int)); [L80] CALL tree_inorder(t, x, n) [L58] COND FALSE !(!t) [L61] EXPR t->left [L61] CALL, EXPR tree_inorder(t->left, a, i) [L58] COND TRUE !t [L59] return i; [L61] RET, EXPR tree_inorder(t->left, a, i) [L61] i = tree_inorder(t->left, a, i) [L62] EXPR i++ [L62] EXPR t->data [L62] a[i++] = t->data [L63] EXPR t->right [L63] CALL, EXPR tree_inorder(t->right, a, i) [L58] COND TRUE !t [L59] return i; [L63] RET, EXPR tree_inorder(t->right, a, i) [L63] i = tree_inorder(t->right, a, i) [L64] return i; [L80] RET tree_inorder(t, x, n) [L81] EXPR x[0] [L81] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 428 SDtfs, 665 SDslu, 1422 SDs, 0 SdLazy, 1860 SolverSat, 705 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 45045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 64/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...