/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:09:28,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:09:28,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:09:28,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:09:28,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:09:28,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:09:28,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:09:28,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:09:28,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:09:28,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:09:28,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:09:28,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:09:28,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:09:28,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:09:28,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:09:28,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:09:28,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:09:28,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:09:28,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:09:28,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:09:28,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:09:28,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:09:28,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:09:28,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:09:28,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:09:28,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:09:28,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:09:28,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:09:28,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:09:28,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:09:28,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:09:28,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:09:28,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:09:28,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:09:28,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:09:28,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:09:28,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:09:28,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:09:28,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:09:28,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:09:28,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:09:28,606 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 18:09:28,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:09:28,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:09:28,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:09:28,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:09:28,630 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:09:28,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:09:28,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:09:28,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:09:28,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:09:28,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:09:28,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:09:28,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:09:28,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:09:28,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:09:28,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:09:28,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:09:28,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:09:28,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:09:28,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:09:28,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:09:28,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:09:28,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:09:28,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:09:28,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:09:28,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:09:28,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:09:28,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:09:28,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:09:28,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:09:28,635 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:09:28,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:09:28,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:09:28,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:09:28,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:09:28,976 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:09:28,977 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-08-21 18:09:29,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18031ae88/b4ff59a7e64c4e578548cd8f78f75046/FLAG55f80429d [2020-08-21 18:09:29,477 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:09:29,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-08-21 18:09:29,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18031ae88/b4ff59a7e64c4e578548cd8f78f75046/FLAG55f80429d [2020-08-21 18:09:29,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18031ae88/b4ff59a7e64c4e578548cd8f78f75046 [2020-08-21 18:09:29,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:09:29,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:09:29,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:29,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:09:29,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:09:29,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:29" (1/1) ... [2020-08-21 18:09:29,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92c0d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:29, skipping insertion in model container [2020-08-21 18:09:29,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:29" (1/1) ... [2020-08-21 18:09:29,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:09:29,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:09:30,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:30,159 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:09:30,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:30,191 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:30,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30 WrapperNode [2020-08-21 18:09:30,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:30,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:30,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:30,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:30,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (1/1) ... [2020-08-21 18:09:30,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:30,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:30,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:30,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:30,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (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 18:09:30,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:30,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:30,362 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-21 18:09:30,363 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-08-21 18:09:30,363 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-08-21 18:09:30,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:09:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-21 18:09:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-08-21 18:09:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:09:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-08-21 18:09:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:09:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:09:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:09:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:09:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:09:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:09:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:30,639 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:30,639 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:09:30,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:30 BoogieIcfgContainer [2020-08-21 18:09:30,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:30,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:30,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:30,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:30,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:09:29" (1/3) ... [2020-08-21 18:09:30,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317c21df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:30, skipping insertion in model container [2020-08-21 18:09:30,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:30" (2/3) ... [2020-08-21 18:09:30,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317c21df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:30, skipping insertion in model container [2020-08-21 18:09:30,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:30" (3/3) ... [2020-08-21 18:09:30,653 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-08-21 18:09:30,665 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:30,674 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:30,690 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:30,726 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:30,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:30,726 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:30,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:30,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:30,729 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:30,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:30,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 18:09:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 18:09:30,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:30,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:30,777 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1715006850, now seen corresponding path program 1 times [2020-08-21 18:09:30,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:30,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563025190] [2020-08-21 18:09:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:09:30,997 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:09:30,998 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:09:31,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:31,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:31 BoogieIcfgContainer [2020-08-21 18:09:31,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:09:31,026 INFO L168 Benchmark]: Toolchain (without parser) took 1107.89 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.8 MB in the beginning and 148.1 MB in the end (delta: -45.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:31,027 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:09:31,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.46 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:31,030 INFO L168 Benchmark]: Boogie Preprocessor took 108.30 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 179.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:31,031 INFO L168 Benchmark]: RCFGBuilder took 343.54 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 162.9 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:31,032 INFO L168 Benchmark]: TraceAbstraction took 377.01 ms. Allocated memory is still 202.4 MB. Free memory was 162.2 MB in the beginning and 148.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:31,036 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.46 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.30 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 179.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.54 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 162.9 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 377.01 ms. Allocated memory is still 202.4 MB. Free memory was 162.2 MB in the beginning and 148.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i = 1; [L37] struct list *l,m; [L38] l = &m [L39] l->next = 0 [L40] l->n = 0 [L42] CALL, EXPR append(l, 1) [L25] struct list *new_el; [L27] CALL, EXPR allocate_memory() [L20] return malloc(8U); [L27] RET, EXPR allocate_memory() [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; [L42] RET, EXPR append(l, 1) [L42] l = append(l, 1) [L43] CALL, EXPR append(l, 2) [L25] struct list *new_el; [L27] CALL, EXPR allocate_memory() [L20] return malloc(8U); [L27] RET, EXPR allocate_memory() [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; [L43] RET, EXPR append(l, 2) [L43] l = append(l, 2) [L48] EXPR l->next [L48] EXPR l->next->next [L48] EXPR l->next->next->n [L48] COND TRUE l->next->next->n == 0 [L48] CALL err() [L8] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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...