/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_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:42:57,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:42:57,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:42:57,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:42:57,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:42:57,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:42:57,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:42:57,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:42:57,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:42:57,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:42:57,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:42:57,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:42:57,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:42:57,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:42:57,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:42:57,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:42:57,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:42:57,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:42:57,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:42:57,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:42:57,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:42:57,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:42:57,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:42:57,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:42:57,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:42:57,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:42:57,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:42:57,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:42:57,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:42:57,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:42:57,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:42:57,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:42:57,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:42:57,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:42:57,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:42:57,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:42:57,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:42:57,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:42:57,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:42:57,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:42:57,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:42:57,313 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 20:42:57,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:42:57,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:42:57,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:42:57,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:42:57,358 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:42:57,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:42:57,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:42:57,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:42:57,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:42:57,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:42:57,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:42:57,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:42:57,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:42:57,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:42:57,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:42:57,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:42:57,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:42:57,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:42:57,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:42:57,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:42:57,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:42:57,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:42:57,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:42:57,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:42:57,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:42:57,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:42:57,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:42:57,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:42:57,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:42:57,365 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 20:42:57,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:42:57,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:42:57,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:42:57,659 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:42:57,660 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:42:57,661 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-21 20:42:57,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/31ed5bd02/a83a0159b49a4c528ce1a9cbd12187c3/FLAG219536ea2 [2020-08-21 20:42:58,216 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:42:58,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-21 20:42:58,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/31ed5bd02/a83a0159b49a4c528ce1a9cbd12187c3/FLAG219536ea2 [2020-08-21 20:42:58,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/31ed5bd02/a83a0159b49a4c528ce1a9cbd12187c3 [2020-08-21 20:42:58,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:42:58,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:42:58,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:42:58,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:42:58,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:42:58,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:42:58" (1/1) ... [2020-08-21 20:42:58,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723eb1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:58, skipping insertion in model container [2020-08-21 20:42:58,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:42:58" (1/1) ... [2020-08-21 20:42:58,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:42:58,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:42:58,847 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 20:42:58,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:42:58,877 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:42:58,980 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-21 20:42:58,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:42:59,012 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:42:59,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59 WrapperNode [2020-08-21 20:42:59,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:42:59,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:42:59,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:42:59,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:42:59,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (1/1) ... [2020-08-21 20:42:59,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:42:59,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:42:59,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:42:59,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:42:59,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (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 20:42:59,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:42:59,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:42:59,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 20:42:59,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:42:59,147 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-21 20:42:59,147 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-21 20:42:59,148 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-21 20:42:59,149 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-21 20:42:59,149 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-21 20:42:59,149 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-21 20:42:59,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:42:59,150 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 20:42:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 20:42:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:42:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:42:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:42:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 20:42:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 20:42:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 20:42:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:42:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:42:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-21 20:42:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:42:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:42:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:42:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-21 20:42:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:42:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-21 20:42:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:42:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:42:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-21 20:42:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-21 20:42:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-21 20:42:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:42:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 20:42:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:42:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:42:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:42:59,627 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:42:59,628 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 20:42:59,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:42:59 BoogieIcfgContainer [2020-08-21 20:42:59,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:42:59,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:42:59,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:42:59,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:42:59,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:42:58" (1/3) ... [2020-08-21 20:42:59,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d52b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:42:59, skipping insertion in model container [2020-08-21 20:42:59,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:42:59" (2/3) ... [2020-08-21 20:42:59,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d52b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:42:59, skipping insertion in model container [2020-08-21 20:42:59,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:42:59" (3/3) ... [2020-08-21 20:42:59,642 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-08-21 20:42:59,653 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:42:59,661 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:42:59,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:42:59,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:42:59,701 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:42:59,701 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:42:59,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:42:59,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:42:59,702 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:42:59,702 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:42:59,702 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:42:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-08-21 20:42:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 20:42:59,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:42:59,735 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 20:42:59,736 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:42:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:42:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-08-21 20:42:59,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:42:59,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677433604] [2020-08-21 20:42:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:42:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:42:59,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:42:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:43:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:43:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 20:43:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 20:43:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 20:43:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 20:43:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,104 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 20:43:00,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677433604] [2020-08-21 20:43:00,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:00,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:43:00,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831888786] [2020-08-21 20:43:00,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:43:00,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:00,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:43:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:43:00,132 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-08-21 20:43:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:00,607 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-08-21 20:43:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:43:00,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-21 20:43:00,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:00,622 INFO L225 Difference]: With dead ends: 168 [2020-08-21 20:43:00,622 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 20:43:00,627 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 20:43:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 20:43:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-08-21 20:43:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 20:43:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-08-21 20:43:00,690 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-08-21 20:43:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:00,691 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-08-21 20:43:00,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:43:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-08-21 20:43:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 20:43:00,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:00,695 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 20:43:00,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:43:00,696 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-08-21 20:43:00,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:00,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750797025] [2020-08-21 20:43:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:43:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:43:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 20:43:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 20:43:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 20:43:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 20:43:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:00,955 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 20:43:00,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750797025] [2020-08-21 20:43:00,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:00,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 20:43:00,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757106046] [2020-08-21 20:43:00,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:43:00,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:00,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:43:00,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:43:00,959 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-08-21 20:43:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:01,647 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2020-08-21 20:43:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:43:01,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-21 20:43:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:01,651 INFO L225 Difference]: With dead ends: 154 [2020-08-21 20:43:01,651 INFO L226 Difference]: Without dead ends: 97 [2020-08-21 20:43:01,653 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 20:43:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-21 20:43:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-08-21 20:43:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 20:43:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-08-21 20:43:01,672 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-08-21 20:43:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:01,672 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-08-21 20:43:01,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:43:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-08-21 20:43:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 20:43:01,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:01,675 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 20:43:01,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:43:01,676 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-08-21 20:43:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:01,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178926111] [2020-08-21 20:43:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:43:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:43:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 20:43:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:43:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:43:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 20:43:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 20:43:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 20:43:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:01,929 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 20:43:01,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178926111] [2020-08-21 20:43:01,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:43:01,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:43:01,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839005659] [2020-08-21 20:43:01,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:43:01,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:43:01,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:43:01,932 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 12 states. [2020-08-21 20:43:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:02,672 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2020-08-21 20:43:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:43:02,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-08-21 20:43:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:02,679 INFO L225 Difference]: With dead ends: 164 [2020-08-21 20:43:02,680 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 20:43:02,681 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 20:43:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 20:43:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-08-21 20:43:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-21 20:43:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-08-21 20:43:02,697 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2020-08-21 20:43:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:02,697 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-08-21 20:43:02,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:43:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-08-21 20:43:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:02,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:02,700 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 20:43:02,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:43:02,701 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1614566559, now seen corresponding path program 1 times [2020-08-21 20:43:02,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:02,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265643332] [2020-08-21 20:43:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:43:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:43:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 20:43:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:43:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:43:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 20:43:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 20:43:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 20:43:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:02,932 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 20:43:02,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265643332] [2020-08-21 20:43:02,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:02,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 20:43:02,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260770254] [2020-08-21 20:43:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:43:02,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:43:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:43:02,938 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 13 states. [2020-08-21 20:43:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:03,645 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-08-21 20:43:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 20:43:03,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-21 20:43:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:03,648 INFO L225 Difference]: With dead ends: 163 [2020-08-21 20:43:03,648 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 20:43:03,650 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 20:43:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 20:43:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-08-21 20:43:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-21 20:43:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-21 20:43:03,669 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2020-08-21 20:43:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:03,674 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-21 20:43:03,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:43:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-21 20:43:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 20:43:03,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:03,679 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 20:43:03,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:43:03,680 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-08-21 20:43:03,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:03,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871592173] [2020-08-21 20:43:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:43:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:43:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:43:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:43:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:43:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 20:43:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 20:43:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 20:43:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 20:43:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:03,942 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 20:43:03,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871592173] [2020-08-21 20:43:03,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:03,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 20:43:03,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58236310] [2020-08-21 20:43:03,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:43:03,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:43:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:43:03,945 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states. [2020-08-21 20:43:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:04,647 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2020-08-21 20:43:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 20:43:04,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-08-21 20:43:04,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:04,653 INFO L225 Difference]: With dead ends: 151 [2020-08-21 20:43:04,654 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 20:43:04,655 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 20:43:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 20:43:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-08-21 20:43:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 20:43:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-08-21 20:43:04,681 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-08-21 20:43:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:04,681 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-08-21 20:43:04,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:43:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-08-21 20:43:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 20:43:04,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:04,684 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 20:43:04,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:43:04,684 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-08-21 20:43:04,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:04,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053740457] [2020-08-21 20:43:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:43:04,735 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:43:04,735 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:43:04,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:43:04,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:43:04 BoogieIcfgContainer [2020-08-21 20:43:04,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:43:04,778 INFO L168 Benchmark]: Toolchain (without parser) took 6185.28 ms. Allocated memory was 140.5 MB in the beginning and 281.0 MB in the end (delta: 140.5 MB). Free memory was 103.5 MB in the beginning and 142.4 MB in the end (delta: -38.9 MB). Peak memory consumption was 101.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:04,780 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-21 20:43:04,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 420.64 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 180.0 MB in the end (delta: -76.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:04,787 INFO L168 Benchmark]: Boogie Preprocessor took 65.75 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 177.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:04,787 INFO L168 Benchmark]: RCFGBuilder took 553.81 ms. Allocated memory is still 203.4 MB. Free memory was 177.3 MB in the beginning and 142.7 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:04,788 INFO L168 Benchmark]: TraceAbstraction took 5140.02 ms. Allocated memory was 203.4 MB in the beginning and 281.0 MB in the end (delta: 77.6 MB). Free memory was 142.1 MB in the beginning and 142.4 MB in the end (delta: -310.3 kB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:43:04,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 420.64 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 180.0 MB in the end (delta: -76.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.75 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 177.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 553.81 ms. Allocated memory is still 203.4 MB. Free memory was 177.3 MB in the beginning and 142.7 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5140.02 ms. Allocated memory was 203.4 MB in the beginning and 281.0 MB in the end (delta: 77.6 MB). Free memory was 142.1 MB in the beginning and 142.4 MB in the end (delta: -310.3 kB). Peak memory consumption was 77.3 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: 5.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.3s, 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, 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=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, 1.0s 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...