./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/recursive_list.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/recursive_list.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37b220fd67c69dd62d320a9e830f108e76b0f2e5 .............................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:43:23,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:43:23,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:43:23,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:43:23,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:43:23,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:43:23,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:43:23,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:43:23,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:43:23,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:43:23,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:43:23,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:43:23,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:43:23,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:43:23,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:43:23,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:43:23,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:43:23,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:43:23,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:43:23,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:43:23,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:43:23,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:43:23,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:43:23,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:43:23,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:43:23,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:43:23,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:43:23,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:43:23,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:43:23,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:43:23,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:43:23,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:43:23,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:43:23,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:43:23,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:43:23,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:43:23,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:43:23,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:43:23,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:43:23,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:43:23,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:43:23,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:43:23,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:43:23,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:43:23,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:43:23,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:43:23,541 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:43:23,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:43:23,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:43:23,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:43:23,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:43:23,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:43:23,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:43:23,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:43:23,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:43:23,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:43:23,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:43:23,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:43:23,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:43:23,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:43:23,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:43:23,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:43:23,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:43:23,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:43:23,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:43:23,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:43:23,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:43:23,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:43:23,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:43:23,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:43:23,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:43:23,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b220fd67c69dd62d320a9e830f108e76b0f2e5 [2020-10-20 00:43:23,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:43:23,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:43:23,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:43:23,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:43:23,783 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:43:23,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/recursive_list.i [2020-10-20 00:43:23,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70de8302/f16ff538c47f4407a75b06cedb9584c9/FLAG450893c22 [2020-10-20 00:43:24,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:43:24,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i [2020-10-20 00:43:24,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70de8302/f16ff538c47f4407a75b06cedb9584c9/FLAG450893c22 [2020-10-20 00:43:24,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70de8302/f16ff538c47f4407a75b06cedb9584c9 [2020-10-20 00:43:24,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:43:24,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:43:24,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:24,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:43:24,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:43:24,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:24" (1/1) ... [2020-10-20 00:43:24,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1e36cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:24, skipping insertion in model container [2020-10-20 00:43:24,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:24" (1/1) ... [2020-10-20 00:43:24,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:43:24,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:43:25,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:25,048 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:43:25,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:25,089 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:43:25,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25 WrapperNode [2020-10-20 00:43:25,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:25,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:25,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:43:25,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:43:25,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:25,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:43:25,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:43:25,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:43:25,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... [2020-10-20 00:43:25,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:43:25,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:43:25,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:43:25,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:43:25,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-20 00:43:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:43:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:43:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:43:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:43:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:43:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:43:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:43:25,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:43:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:43:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:43:25,488 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:43:25,488 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-20 00:43:25,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:25 BoogieIcfgContainer [2020-10-20 00:43:25,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:43:25,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:43:25,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:43:25,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:43:25,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:43:24" (1/3) ... [2020-10-20 00:43:25,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564dd5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:25, skipping insertion in model container [2020-10-20 00:43:25,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:25" (2/3) ... [2020-10-20 00:43:25,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564dd5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:25, skipping insertion in model container [2020-10-20 00:43:25,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:25" (3/3) ... [2020-10-20 00:43:25,500 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-10-20 00:43:25,513 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:43:25,521 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:43:25,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:43:25,573 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:43:25,573 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:43:25,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:43:25,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:43:25,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:43:25,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:43:25,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:43:25,575 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:43:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-20 00:43:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:43:25,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:25,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:25,635 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 87858985, now seen corresponding path program 1 times [2020-10-20 00:43:25,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:25,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43364789] [2020-10-20 00:43:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:43:25,856 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:43:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:43:25,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:43:25,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:43:25,947 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:43:25,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:43:25,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:43:25 BoogieIcfgContainer [2020-10-20 00:43:25,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:43:25,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:43:25,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:43:25,988 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:43:25,989 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:25" (3/4) ... [2020-10-20 00:43:25,991 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:43:26,057 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:43:26,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:43:26,060 INFO L168 Benchmark]: Toolchain (without parser) took 1381.15 ms. Allocated memory was 36.7 MB in the beginning and 48.2 MB in the end (delta: 11.5 MB). Free memory was 15.5 MB in the beginning and 27.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,061 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 34.1 MB. Free memory was 8.9 MB in the beginning and 8.9 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.25 ms. Allocated memory was 36.7 MB in the beginning and 45.1 MB in the end (delta: 8.4 MB). Free memory was 14.6 MB in the beginning and 26.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,063 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.23 ms. Allocated memory is still 45.1 MB. Free memory was 25.8 MB in the beginning and 24.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,064 INFO L168 Benchmark]: Boogie Preprocessor took 26.71 ms. Allocated memory is still 45.1 MB. Free memory was 24.2 MB in the beginning and 22.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,065 INFO L168 Benchmark]: RCFGBuilder took 338.33 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 22.6 MB in the beginning and 17.3 MB in the end (delta: 5.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,068 INFO L168 Benchmark]: TraceAbstraction took 495.85 ms. Allocated memory was 46.1 MB in the beginning and 46.7 MB in the end (delta: 524.3 kB). Free memory was 16.6 MB in the beginning and 13.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,069 INFO L168 Benchmark]: Witness Printer took 69.66 ms. Allocated memory was 46.7 MB in the beginning and 48.2 MB in the end (delta: 1.6 MB). Free memory was 13.7 MB in the beginning and 27.8 MB in the end (delta: -14.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:26,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 34.1 MB. Free memory was 8.9 MB in the beginning and 8.9 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 405.25 ms. Allocated memory was 36.7 MB in the beginning and 45.1 MB in the end (delta: 8.4 MB). Free memory was 14.6 MB in the beginning and 26.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.23 ms. Allocated memory is still 45.1 MB. Free memory was 25.8 MB in the beginning and 24.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.71 ms. Allocated memory is still 45.1 MB. Free memory was 24.2 MB in the beginning and 22.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 338.33 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 22.6 MB in the beginning and 17.3 MB in the end (delta: 5.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 495.85 ms. Allocated memory was 46.1 MB in the beginning and 46.7 MB in the end (delta: 524.3 kB). Free memory was 16.6 MB in the beginning and 13.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. * Witness Printer took 69.66 ms. Allocated memory was 46.7 MB in the beginning and 48.2 MB in the end (delta: 1.6 MB). Free memory was 13.7 MB in the beginning and 27.8 MB in the end (delta: -14.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int i = 1; VAL [i=1] [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 [L27] struct list *new_el; [L22] return malloc(8U); VAL [i=1] [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [i=1] [L44] l = append(l, 1) [L27] struct list *new_el; [L22] return malloc(8U); VAL [i=1] [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [i=1] [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1] [L50] COND TRUE l->next->next->n == 0 [L3] __assert_fail("0", "recursive_list.i", 3, "reach_error") VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, 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=14occurred 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, 8 NumberOfCodeBlocks, 8 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...