/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 20:33:51,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:33:51,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:33:51,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:33:51,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:33:51,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:33:51,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:33:51,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:33:51,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:33:51,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:33:51,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:33:51,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:33:51,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:33:51,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:33:51,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:33:51,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:33:51,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:33:51,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:33:51,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:33:51,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:33:51,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:33:51,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:33:51,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:33:51,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:33:51,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:33:51,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:33:51,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:33:51,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:33:51,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:33:51,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:33:51,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:33:51,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:33:51,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:33:51,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:33:51,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:33:51,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:33:51,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:33:51,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:33:51,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:33:51,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:33:51,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:33:51,129 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 [2020-08-21 20:33:51,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:33:51,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:33:51,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:33:51,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:33:51,153 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:33:51,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:33:51,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:33:51,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:33:51,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:33:51,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:33:51,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:33:51,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:33:51,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:33:51,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:33:51,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:33:51,156 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:33:51,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:33:51,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:33:51,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:33:51,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:33:51,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:33:51,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:33:51,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:33:51,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:33:51,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:33:51,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:33:51,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:33:51,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:33:51,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:33:51,159 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=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:33:51,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:33:51,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:33:51,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:33:51,470 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:33:51,470 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:33:51,471 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-08-21 20:33:51,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376123093/48d993205b8c4f4ba60ef9c2d6170629/FLAG8b36f17ec [2020-08-21 20:33:52,026 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:33:52,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-08-21 20:33:52,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376123093/48d993205b8c4f4ba60ef9c2d6170629/FLAG8b36f17ec [2020-08-21 20:33:52,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376123093/48d993205b8c4f4ba60ef9c2d6170629 [2020-08-21 20:33:52,400 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:33:52,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:33:52,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:33:52,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:33:52,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:33:52,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572ce4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52, skipping insertion in model container [2020-08-21 20:33:52,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:33:52,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:33:52,679 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 20:33:52,681 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 20:33:52,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:33:52,713 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:33:52,816 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 20:33:52,818 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 20:33:52,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:33:52,872 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:33:52,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52 WrapperNode [2020-08-21 20:33:52,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:33:52,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:33:52,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:33:52,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:33:52,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (1/1) ... [2020-08-21 20:33:52,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:33:52,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:33:52,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:33:52,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:33:52,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (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 [2020-08-21 20:33:52,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:33:52,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:33:52,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 20:33:52,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:33:52,999 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-21 20:33:52,999 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-21 20:33:52,999 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-21 20:33:52,999 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-21 20:33:52,999 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-21 20:33:52,999 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-21 20:33:53,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:33:53,000 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 20:33:53,000 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 20:33:53,000 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:33:53,000 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:33:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:33:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 20:33:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 20:33:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 20:33:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:33:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:33:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-21 20:33:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:33:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:33:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:33:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-21 20:33:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-21 20:33:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:33:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 20:33:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:33:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:33:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:33:53,520 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:33:53,520 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:33:53,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:33:53 BoogieIcfgContainer [2020-08-21 20:33:53,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:33:53,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:33:53,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:33:53,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:33:53,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:33:52" (1/3) ... [2020-08-21 20:33:53,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e897e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:33:53, skipping insertion in model container [2020-08-21 20:33:53,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:33:52" (2/3) ... [2020-08-21 20:33:53,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e897e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:33:53, skipping insertion in model container [2020-08-21 20:33:53,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:33:53" (3/3) ... [2020-08-21 20:33:53,536 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-08-21 20:33:53,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:33:53,557 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:33:53,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:33:53,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:33:53,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:33:53,601 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:33:53,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:33:53,602 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:33:53,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:33:53,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:33:53,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:33:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-08-21 20:33:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 20:33:53,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:33:53,639 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] [2020-08-21 20:33:53,639 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:33:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:33:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times [2020-08-21 20:33:53,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:33:53,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214710409] [2020-08-21 20:33:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:33:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:53,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:33:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:53,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:33:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:33:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:53,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 20:33:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:53,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 20:33:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:53,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 20:33:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 20:33:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:33:54,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214710409] [2020-08-21 20:33:54,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:33:54,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:33:54,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795034088] [2020-08-21 20:33:54,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:33:54,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:33:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:33:54,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:33:54,091 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 6 states. [2020-08-21 20:33:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:33:54,536 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-08-21 20:33:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:33:54,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-21 20:33:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:33:54,553 INFO L225 Difference]: With dead ends: 165 [2020-08-21 20:33:54,553 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 20:33:54,558 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 [2020-08-21 20:33:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 20:33:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-08-21 20:33:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 20:33:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-08-21 20:33:54,621 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44 [2020-08-21 20:33:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:33:54,622 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-08-21 20:33:54,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:33:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-08-21 20:33:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 20:33:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:33:54,627 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] [2020-08-21 20:33:54,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:33:54,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:33:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:33:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times [2020-08-21 20:33:54,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:33:54,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699909777] [2020-08-21 20:33:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:33:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:33:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:33:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:33:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 20:33:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 20:33:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 20:33:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 20:33:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:33:54,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699909777] [2020-08-21 20:33:54,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:33:54,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 20:33:54,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442350094] [2020-08-21 20:33:54,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:33:54,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:33:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:33:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:33:54,880 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states. [2020-08-21 20:33:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:33:55,584 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2020-08-21 20:33:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:33:55,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-21 20:33:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:33:55,588 INFO L225 Difference]: With dead ends: 151 [2020-08-21 20:33:55,588 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 20:33:55,590 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 [2020-08-21 20:33:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 20:33:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-21 20:33:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 20:33:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-21 20:33:55,608 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44 [2020-08-21 20:33:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:33:55,609 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-21 20:33:55,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:33:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-21 20:33:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 20:33:55,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:33:55,612 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] [2020-08-21 20:33:55,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:33:55,612 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:33:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:33:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times [2020-08-21 20:33:55,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:33:55,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061340192] [2020-08-21 20:33:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:33:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:33:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:33:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:33:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 20:33:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:33:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:33:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 20:33:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 20:33:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 20:33:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 20:33:55,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061340192] [2020-08-21 20:33:55,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:33:55,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:33:55,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530376720] [2020-08-21 20:33:55,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:33:55,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:33:55,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:33:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:33:55,864 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 12 states. [2020-08-21 20:33:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:33:56,672 INFO L93 Difference]: Finished difference Result 161 states and 206 transitions. [2020-08-21 20:33:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:33:56,673 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-08-21 20:33:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:33:56,678 INFO L225 Difference]: With dead ends: 161 [2020-08-21 20:33:56,679 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 20:33:56,682 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 [2020-08-21 20:33:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 20:33:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-08-21 20:33:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 20:33:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-08-21 20:33:56,711 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56 [2020-08-21 20:33:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:33:56,712 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-08-21 20:33:56,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:33:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-08-21 20:33:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:33:56,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:33:56,720 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] [2020-08-21 20:33:56,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:33:56,720 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:33:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:33:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times [2020-08-21 20:33:56,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:33:56,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108814820] [2020-08-21 20:33:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:33:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:33:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:33:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:33:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:33:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:33:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 20:33:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:33:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:33:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 20:33:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 20:33:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 20:33:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 20:33:56,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108814820] [2020-08-21 20:33:56,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:33:56,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 20:33:56,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094678450] [2020-08-21 20:33:56,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:33:56,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:33:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:33:56,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:33:56,947 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states. [2020-08-21 20:33:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:33:57,670 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-08-21 20:33:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 20:33:57,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-21 20:33:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:33:57,675 INFO L225 Difference]: With dead ends: 160 [2020-08-21 20:33:57,675 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 20:33:57,677 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 [2020-08-21 20:33:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 20:33:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-08-21 20:33:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 20:33:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-08-21 20:33:57,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66 [2020-08-21 20:33:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:33:57,691 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-08-21 20:33:57,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:33:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-08-21 20:33:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 20:33:57,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:33:57,694 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] [2020-08-21 20:33:57,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:33:57,694 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:33:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:33:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times [2020-08-21 20:33:57,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:33:57,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093581673] [2020-08-21 20:33:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:33:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:33:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:33:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:33:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:33:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:33:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:33:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:33:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:33:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:33:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:33:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 20:33:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 20:33:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 20:33:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:33:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-21 20:33:57,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093581673] [2020-08-21 20:33:57,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:33:57,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 20:33:57,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607611790] [2020-08-21 20:33:57,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:33:57,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:33:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:33:57,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:33:57,956 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states. [2020-08-21 20:33:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:33:58,633 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2020-08-21 20:33:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 20:33:58,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-08-21 20:33:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:33:58,635 INFO L225 Difference]: With dead ends: 148 [2020-08-21 20:33:58,636 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 20:33:58,637 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 [2020-08-21 20:33:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 20:33:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-21 20:33:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 20:33:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-08-21 20:33:58,651 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 79 [2020-08-21 20:33:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:33:58,652 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-08-21 20:33:58,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:33:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-08-21 20:33:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 20:33:58,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:33:58,655 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] [2020-08-21 20:33:58,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:33:58,655 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:33:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:33:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times [2020-08-21 20:33:58,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:33:58,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249441637] [2020-08-21 20:33:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:33:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:33:58,696 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:33:58,696 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:33:58,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:33:58,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:33:58 BoogieIcfgContainer [2020-08-21 20:33:58,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:33:58,729 INFO L168 Benchmark]: Toolchain (without parser) took 6326.77 ms. Allocated memory was 140.5 MB in the beginning and 285.7 MB in the end (delta: 145.2 MB). Free memory was 102.7 MB in the beginning and 170.6 MB in the end (delta: -67.9 MB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:33:58,730 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 20:33:58,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 471.15 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 178.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:33:58,732 INFO L168 Benchmark]: Boogie Preprocessor took 61.88 ms. Allocated memory is still 202.9 MB. Free memory was 178.6 MB in the beginning and 176.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:33:58,733 INFO L168 Benchmark]: RCFGBuilder took 588.29 ms. Allocated memory is still 202.9 MB. Free memory was 176.0 MB in the beginning and 143.0 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-08-21 20:33:58,734 INFO L168 Benchmark]: TraceAbstraction took 5198.75 ms. Allocated memory was 202.9 MB in the beginning and 285.7 MB in the end (delta: 82.8 MB). Free memory was 143.0 MB in the beginning and 170.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-08-21 20:33:58,737 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 471.15 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 178.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.88 ms. Allocated memory is still 202.9 MB. Free memory was 178.6 MB in the beginning and 176.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 588.29 ms. Allocated memory is still 202.9 MB. Free memory was 176.0 MB in the beginning and 143.0 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5198.75 ms. Allocated memory was 202.9 MB in the beginning and 285.7 MB in the end (delta: 82.8 MB). Free memory was 143.0 MB in the beginning and 170.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 55.2 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: 5.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.4s, 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, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s 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, 0.1s SatisfiabilityAnalysisTime, 1.0s 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...