/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:38:54,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:38:54,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:38:54,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:38:54,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:38:54,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:38:54,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:38:54,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:38:54,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:38:54,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:38:54,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:38:54,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:38:54,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:38:54,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:38:54,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:38:54,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:38:54,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:38:54,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:38:54,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:38:54,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:38:54,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:38:54,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:38:54,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:38:54,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:38:54,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:38:54,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:38:54,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:38:54,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:38:54,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:38:54,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 19:38:54,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 19:38:54,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 19:38:54,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 19:38:54,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 19:38:54,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 19:38:54,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 19:38:54,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 19:38:54,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 19:38:54,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:38:54,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:38:54,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:38:54,413 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 [2020-08-18 19:38:54,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:38:54,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:38:54,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:38:54,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:38:54,449 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:38:54,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:38:54,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:38:54,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:38:54,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:38:54,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:38:54,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:38:54,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:38:54,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:38:54,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:38:54,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:38:54,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:38:54,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:38:54,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:38:54,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:38:54,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:38:54,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:38:54,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:38:54,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:38:54,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:38:54,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:38:54,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:38:54,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:38:54,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:38:54,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:38:54,454 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:38:54,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:38:54,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:38:54,778 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:38:54,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:38:54,780 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:38:54,781 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-18 19:38:54,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a07f0dd3/086cd0d48efa4c199d1b5a8a53326b00/FLAG710e5fb4e [2020-08-18 19:38:55,325 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:38:55,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-18 19:38:55,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a07f0dd3/086cd0d48efa4c199d1b5a8a53326b00/FLAG710e5fb4e [2020-08-18 19:38:55,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a07f0dd3/086cd0d48efa4c199d1b5a8a53326b00 [2020-08-18 19:38:55,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:38:55,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:38:55,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:38:55,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:38:55,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:38:55,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:38:55" (1/1) ... [2020-08-18 19:38:55,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a146fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:55, skipping insertion in model container [2020-08-18 19:38:55,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:38:55" (1/1) ... [2020-08-18 19:38:55,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:38:55,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:38:55,921 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-18 19:38:55,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:38:55,952 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:38:56,056 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-18 19:38:56,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:38:56,091 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:38:56,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56 WrapperNode [2020-08-18 19:38:56,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:38:56,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:38:56,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:38:56,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:38:56,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (1/1) ... [2020-08-18 19:38:56,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:38:56,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:38:56,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:38:56,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:38:56,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (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 [2020-08-18 19:38:56,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:38:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:38:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 19:38:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 19:38:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-18 19:38:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-18 19:38:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-18 19:38:56,242 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-18 19:38:56,243 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-18 19:38:56,243 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-18 19:38:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:38:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-18 19:38:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 19:38:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 19:38:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 19:38:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:38:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 19:38:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 19:38:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 19:38:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:38:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 19:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-18 19:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 19:38:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:38:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 19:38:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-18 19:38:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:38:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-18 19:38:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:38:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:38:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:38:56,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:38:56,780 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 19:38:56,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:38:56 BoogieIcfgContainer [2020-08-18 19:38:56,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:38:56,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:38:56,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:38:56,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:38:56,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:38:55" (1/3) ... [2020-08-18 19:38:56,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e03b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:38:56, skipping insertion in model container [2020-08-18 19:38:56,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:56" (2/3) ... [2020-08-18 19:38:56,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e03b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:38:56, skipping insertion in model container [2020-08-18 19:38:56,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:38:56" (3/3) ... [2020-08-18 19:38:56,800 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-08-18 19:38:56,808 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:38:56,815 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:38:56,825 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:38:56,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:38:56,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:38:56,846 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:38:56,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:38:56,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:38:56,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:38:56,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:38:56,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:38:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-08-18 19:38:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 19:38:56,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:38:56,878 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] [2020-08-18 19:38:56,879 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:38:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:38:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-08-18 19:38:56,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:38:56,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640551267] [2020-08-18 19:38:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:38:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:38:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:38:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 19:38:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 19:38:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 19:38:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 19:38:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 19:38:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:38:57,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640551267] [2020-08-18 19:38:57,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:38:57,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 19:38:57,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260179011] [2020-08-18 19:38:57,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:38:57,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:38:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:38:57,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:38:57,322 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-08-18 19:38:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:38:57,783 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-08-18 19:38:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:38:57,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-18 19:38:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:38:57,799 INFO L225 Difference]: With dead ends: 168 [2020-08-18 19:38:57,799 INFO L226 Difference]: Without dead ends: 95 [2020-08-18 19:38:57,804 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 [2020-08-18 19:38:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-18 19:38:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-08-18 19:38:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 19:38:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-08-18 19:38:57,867 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-08-18 19:38:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:38:57,868 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-08-18 19:38:57,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:38:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-08-18 19:38:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 19:38:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:38:57,872 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] [2020-08-18 19:38:57,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:38:57,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:38:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:38:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-08-18 19:38:57,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:38:57,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301712000] [2020-08-18 19:38:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:38:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:38:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:38:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 19:38:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 19:38:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 19:38:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 19:38:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 19:38:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:38:58,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301712000] [2020-08-18 19:38:58,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:38:58,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 19:38:58,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048346939] [2020-08-18 19:38:58,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:38:58,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:38:58,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:38:58,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:38:58,145 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-08-18 19:38:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:38:58,852 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2020-08-18 19:38:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:38:58,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-18 19:38:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:38:58,857 INFO L225 Difference]: With dead ends: 154 [2020-08-18 19:38:58,861 INFO L226 Difference]: Without dead ends: 97 [2020-08-18 19:38:58,865 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 [2020-08-18 19:38:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-18 19:38:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-08-18 19:38:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 19:38:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-08-18 19:38:58,886 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-08-18 19:38:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:38:58,887 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-08-18 19:38:58,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:38:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-08-18 19:38:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 19:38:58,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:38:58,890 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] [2020-08-18 19:38:58,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:38:58,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:38:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:38:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-08-18 19:38:58,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:38:58,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831575159] [2020-08-18 19:38:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:38:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:58,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:38:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:38:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 19:38:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 19:38:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:38:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 19:38:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:38:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 19:38:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 19:38:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 19:38:59,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831575159] [2020-08-18 19:38:59,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:38:59,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:38:59,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721096040] [2020-08-18 19:38:59,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:38:59,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:38:59,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:38:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:38:59,180 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 12 states. [2020-08-18 19:39:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:39:00,037 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2020-08-18 19:39:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:39:00,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-08-18 19:39:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:39:00,041 INFO L225 Difference]: With dead ends: 164 [2020-08-18 19:39:00,041 INFO L226 Difference]: Without dead ends: 96 [2020-08-18 19:39:00,042 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 [2020-08-18 19:39:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-18 19:39:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-08-18 19:39:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-18 19:39:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-08-18 19:39:00,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2020-08-18 19:39:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:39:00,059 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-08-18 19:39:00,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:39:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-08-18 19:39:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 19:39:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:39:00,062 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] [2020-08-18 19:39:00,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:39:00,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:39:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:39:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1614566559, now seen corresponding path program 1 times [2020-08-18 19:39:00,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:39:00,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981975000] [2020-08-18 19:39:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:39:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:39:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:39:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:39:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:39:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 19:39:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 19:39:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:39:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 19:39:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:39:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 19:39:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 19:39:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 19:39:00,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981975000] [2020-08-18 19:39:00,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:39:00,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 19:39:00,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188258586] [2020-08-18 19:39:00,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 19:39:00,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:39:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 19:39:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:39:00,335 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 13 states. [2020-08-18 19:39:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:39:01,076 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-08-18 19:39:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 19:39:01,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-18 19:39:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:39:01,080 INFO L225 Difference]: With dead ends: 163 [2020-08-18 19:39:01,080 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 19:39:01,081 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 [2020-08-18 19:39:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 19:39:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-08-18 19:39:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-18 19:39:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-18 19:39:01,094 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2020-08-18 19:39:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:39:01,095 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-18 19:39:01,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 19:39:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-18 19:39:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 19:39:01,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:39:01,098 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] [2020-08-18 19:39:01,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:39:01,099 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:39:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:39:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-08-18 19:39:01,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:39:01,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304166131] [2020-08-18 19:39:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:39:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:39:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:39:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:39:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:39:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 19:39:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:39:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 19:39:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 19:39:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:39:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 19:39:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 19:39:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 19:39:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 19:39:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-18 19:39:01,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304166131] [2020-08-18 19:39:01,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:39:01,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 19:39:01,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710262126] [2020-08-18 19:39:01,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 19:39:01,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:39:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 19:39:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:39:01,371 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states. [2020-08-18 19:39:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:39:02,026 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2020-08-18 19:39:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 19:39:02,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-08-18 19:39:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:39:02,031 INFO L225 Difference]: With dead ends: 151 [2020-08-18 19:39:02,031 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 19:39:02,032 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 [2020-08-18 19:39:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 19:39:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-08-18 19:39:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 19:39:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-08-18 19:39:02,062 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-08-18 19:39:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:39:02,063 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-08-18 19:39:02,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 19:39:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-08-18 19:39:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 19:39:02,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:39:02,074 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] [2020-08-18 19:39:02,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:39:02,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:39:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:39:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-08-18 19:39:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:39:02,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601402785] [2020-08-18 19:39:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:39:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:39:02,140 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:39:02,141 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:39:02,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:39:02,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:39:02 BoogieIcfgContainer [2020-08-18 19:39:02,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:39:02,183 INFO L168 Benchmark]: Toolchain (without parser) took 6495.88 ms. Allocated memory was 141.0 MB in the beginning and 280.5 MB in the end (delta: 139.5 MB). Free memory was 103.3 MB in the beginning and 140.3 MB in the end (delta: -36.9 MB). Peak memory consumption was 102.5 MB. Max. memory is 7.1 GB. [2020-08-18 19:39:02,185 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 19:39:02,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.96 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.1 MB in the beginning and 180.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:39:02,192 INFO L168 Benchmark]: Boogie Preprocessor took 83.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:39:02,192 INFO L168 Benchmark]: RCFGBuilder took 609.26 ms. Allocated memory is still 203.9 MB. Free memory was 177.3 MB in the beginning and 142.4 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:39:02,193 INFO L168 Benchmark]: TraceAbstraction took 5392.71 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 142.4 MB in the beginning and 140.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 78.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:39:02,206 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 405.96 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.1 MB in the beginning and 180.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.5 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 609.26 ms. Allocated memory is still 203.9 MB. Free memory was 177.3 MB in the beginning and 142.4 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5392.71 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 142.4 MB in the beginning and 140.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 78.7 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: [L103] 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; [L103] RET, EXPR nondet_tree() [L103] CALL task(nondet_tree()) [L81] 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; [L81] RET, EXPR min(t) [L81] int a = min(t); [L82] int b; [L84] CALL, EXPR size(t) [L76] COND FALSE !(!t) [L77] EXPR t->left [L77] CALL, EXPR size(t->left) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->left) [L77] EXPR t->right [L77] CALL, EXPR size(t->right) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->right) [L77] return size(t->left) + size(t->right) + 1; [L84] RET, EXPR size(t) [L84] int n = size(t); [L85] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L85] RET assume_abort_if_not(n != 0) [L86] EXPR, FCALL calloc(n, sizeof(int)) [L86] int *x = calloc(n, sizeof(int)); [L87] CALL tree_inorder(t, x, n) [L65] COND FALSE !(!t) [L68] EXPR t->left [L68] CALL, EXPR tree_inorder(t->left, a, i) [L65] COND TRUE !t [L66] return i; [L68] RET, EXPR tree_inorder(t->left, a, i) [L68] i = tree_inorder(t->left, a, i) [L69] EXPR i++ [L69] EXPR t->data [L69] a[i++] = t->data [L70] EXPR t->right [L70] CALL, EXPR tree_inorder(t->right, a, i) [L65] COND TRUE !t [L66] return i; [L70] RET, EXPR tree_inorder(t->right, a, i) [L70] i = tree_inorder(t->right, a, i) [L71] return i; [L87] RET tree_inorder(t, x, n) [L88] EXPR x[0] [L88] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 418 SDtfs, 667 SDslu, 1336 SDs, 0 SdLazy, 1975 SolverSat, 666 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred 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, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s 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...