/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=SMALLEST --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 15:44:35,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:44:35,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:44:35,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:44:35,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:44:35,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:44:35,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:44:35,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:44:35,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:44:35,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:44:35,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:44:35,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:44:35,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:44:35,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:44:35,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:44:35,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:44:35,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:44:35,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:44:35,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:44:35,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:44:35,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:44:35,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:44:35,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:44:35,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:44:35,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:44:35,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:44:35,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:44:35,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:44:35,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:44:35,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:44:35,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:44:35,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:44:35,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:44:35,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:44:35,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:44:35,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:44:35,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:44:35,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:44:35,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:44:35,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:44:35,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:44:35,498 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 15:44:35,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:44:35,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:44:35,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:44:35,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:44:35,522 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:44:35,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:44:35,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:44:35,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:44:35,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:44:35,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:44:35,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:44:35,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:44:35,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:44:35,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:44:35,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:44:35,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:44:35,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:44:35,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:44:35,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:44:35,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:44:35,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:44:35,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:44:35,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:44:35,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:44:35,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:44:35,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:44:35,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:44:35,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:44:35,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:44:35,527 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:44:35,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:44:35,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:44:35,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:44:35,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:44:35,836 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:44:35,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-08-21 15:44:35,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6134a6d78/4cadf55873b94923a5470dab85281dc1/FLAG9720333b1 [2020-08-21 15:44:36,379 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:44:36,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-08-21 15:44:36,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6134a6d78/4cadf55873b94923a5470dab85281dc1/FLAG9720333b1 [2020-08-21 15:44:36,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6134a6d78/4cadf55873b94923a5470dab85281dc1 [2020-08-21 15:44:36,769 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:44:36,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:44:36,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:36,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:44:36,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:44:36,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:36" (1/1) ... [2020-08-21 15:44:36,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729acd32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:36, skipping insertion in model container [2020-08-21 15:44:36,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:36" (1/1) ... [2020-08-21 15:44:36,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:44:36,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:44:37,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:37,025 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:44:37,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:37,057 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:44:37,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37 WrapperNode [2020-08-21 15:44:37,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:37,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:44:37,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:44:37,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:44:37,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (1/1) ... [2020-08-21 15:44:37,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:44:37,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:44:37,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:44:37,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:44:37,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (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 15:44:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:44:37,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:44:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-21 15:44:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-08-21 15:44:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-08-21 15:44:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:44:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:44:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:44:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-21 15:44:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:44:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 15:44:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:44:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:44:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:44:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:44:37,497 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:44:37,497 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:44:37,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:37 BoogieIcfgContainer [2020-08-21 15:44:37,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:44:37,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:44:37,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:44:37,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:44:37,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:44:36" (1/3) ... [2020-08-21 15:44:37,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a96bcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:37, skipping insertion in model container [2020-08-21 15:44:37,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:37" (2/3) ... [2020-08-21 15:44:37,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a96bcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:37, skipping insertion in model container [2020-08-21 15:44:37,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:37" (3/3) ... [2020-08-21 15:44:37,519 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-08-21 15:44:37,536 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:44:37,542 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:44:37,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:44:37,587 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:44:37,587 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:44:37,587 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:44:37,587 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:44:37,588 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:44:37,588 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:44:37,588 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:44:37,588 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:44:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 15:44:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 15:44:37,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:37,615 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 15:44:37,616 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:37,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1715006850, now seen corresponding path program 1 times [2020-08-21 15:44:37,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:37,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101803063] [2020-08-21 15:44:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:44:37,834 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:44:37,835 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:44:37,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:44:37,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:44:37 BoogieIcfgContainer [2020-08-21 15:44:37,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:44:37,861 INFO L168 Benchmark]: Toolchain (without parser) took 1089.19 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 149.0 MB in the end (delta: -45.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:37,862 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:44:37,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.42 ms. Allocated memory is still 141.0 MB. Free memory was 103.5 MB in the beginning and 92.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:37,864 INFO L168 Benchmark]: Boogie Preprocessor took 129.94 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.8 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:37,865 INFO L168 Benchmark]: RCFGBuilder took 313.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 163.8 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:37,866 INFO L168 Benchmark]: TraceAbstraction took 354.71 ms. Allocated memory is still 203.4 MB. Free memory was 163.8 MB in the beginning and 149.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:37,870 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.42 ms. Allocated memory is still 141.0 MB. Free memory was 103.5 MB in the beginning and 92.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.94 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.8 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 163.8 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 354.71 ms. Allocated memory is still 203.4 MB. Free memory was 163.8 MB in the beginning and 149.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 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...