/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:54:05,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:54:05,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:54:05,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:54:05,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:54:05,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:54:05,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:54:05,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:54:05,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:54:05,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:54:05,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:54:05,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:54:05,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:54:05,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:54:05,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:54:05,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:54:05,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:54:05,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:54:05,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:54:05,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:54:05,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:54:05,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:54:05,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:54:05,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:54:05,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:54:05,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:54:05,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:54:05,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:54:05,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:54:05,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:54:05,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:54:05,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:54:05,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:54:05,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:54:05,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:54:05,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:54:05,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:54:05,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:54:05,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:54:05,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:54:05,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:54:05,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:54:05,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:54:05,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:54:05,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:54:05,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:54:05,626 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:54:05,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:54:05,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:54:05,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:54:05,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:54:05,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:54:05,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:54:05,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:54:05,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:54:05,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:54:05,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:54:05,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:54:05,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:54:05,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:54:05,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:54:05,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:54:05,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:54:05,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:54:05,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:54:05,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:54:05,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:54:05,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:54:05,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:54:05,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:54:05,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:54:05,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:54:05,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:54:05,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:54:05,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:54:05,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:54:05,982 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:54:05,983 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-08-18 17:54:06,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34f23f883/84032f4144b6480c8a95f7c76216e3aa/FLAG84375bdf2 [2020-08-18 17:54:06,477 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:54:06,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-08-18 17:54:06,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34f23f883/84032f4144b6480c8a95f7c76216e3aa/FLAG84375bdf2 [2020-08-18 17:54:06,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34f23f883/84032f4144b6480c8a95f7c76216e3aa [2020-08-18 17:54:06,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:54:06,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:54:06,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:54:06,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:54:06,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:54:06,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:54:06" (1/1) ... [2020-08-18 17:54:06,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530cd126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:06, skipping insertion in model container [2020-08-18 17:54:06,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:54:06" (1/1) ... [2020-08-18 17:54:06,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:54:06,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:54:07,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:54:07,093 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:54:07,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:54:07,131 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:54:07,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07 WrapperNode [2020-08-18 17:54:07,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:54:07,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:54:07,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:54:07,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:54:07,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... [2020-08-18 17:54:07,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:54:07,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:54:07,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:54:07,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:54:07,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:54:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:54:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:54:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-18 17:54:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-08-18 17:54:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-08-18 17:54:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:54:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:54:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:54:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-18 17:54:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:54:07,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:54:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:54:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:54:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:54:07,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:54:07,676 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:54:07,677 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:54:07,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:54:07 BoogieIcfgContainer [2020-08-18 17:54:07,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:54:07,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:54:07,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:54:07,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:54:07,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:54:06" (1/3) ... [2020-08-18 17:54:07,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e712954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:54:07, skipping insertion in model container [2020-08-18 17:54:07,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:07" (2/3) ... [2020-08-18 17:54:07,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e712954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:54:07, skipping insertion in model container [2020-08-18 17:54:07,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:54:07" (3/3) ... [2020-08-18 17:54:07,690 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-08-18 17:54:07,701 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:54:07,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:54:07,719 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:54:07,743 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:54:07,743 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:54:07,743 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:54:07,743 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:54:07,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:54:07,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:54:07,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:54:07,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:54:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 17:54:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:54:07,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:07,769 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] [2020-08-18 17:54:07,770 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1715006850, now seen corresponding path program 1 times [2020-08-18 17:54:07,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:07,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877952489] [2020-08-18 17:54:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:54:07,979 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:54:07,979 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:54:07,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:54:08,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:54:07 BoogieIcfgContainer [2020-08-18 17:54:08,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:54:08,003 INFO L168 Benchmark]: Toolchain (without parser) took 1134.12 ms. Allocated memory was 144.7 MB in the beginning and 206.6 MB in the end (delta: 61.9 MB). Free memory was 106.9 MB in the beginning and 152.7 MB in the end (delta: -45.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:08,004 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 17:54:08,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.55 ms. Allocated memory is still 144.7 MB. Free memory was 106.7 MB in the beginning and 96.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:08,006 INFO L168 Benchmark]: Boogie Preprocessor took 153.07 ms. Allocated memory was 144.7 MB in the beginning and 206.6 MB in the end (delta: 61.9 MB). Free memory was 96.1 MB in the beginning and 184.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:08,007 INFO L168 Benchmark]: RCFGBuilder took 395.17 ms. Allocated memory is still 206.6 MB. Free memory was 184.2 MB in the beginning and 167.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:08,008 INFO L168 Benchmark]: TraceAbstraction took 317.39 ms. Allocated memory is still 206.6 MB. Free memory was 167.4 MB in the beginning and 152.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:08,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.55 ms. Allocated memory is still 144.7 MB. Free memory was 106.7 MB in the beginning and 96.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.07 ms. Allocated memory was 144.7 MB in the beginning and 206.6 MB in the end (delta: 61.9 MB). Free memory was 96.1 MB in the beginning and 184.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.17 ms. Allocated memory is still 206.6 MB. Free memory was 184.2 MB in the beginning and 167.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 317.39 ms. Allocated memory is still 206.6 MB. Free memory was 167.4 MB in the beginning and 152.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 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, 0.0s 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...