./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/recursive/Ackermann02.c -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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd82318ec795f8c5ba1d6bd1e94de4995b910941 .............................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-30f4e4a [2019-11-28 00:23:58,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:23:58,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:23:58,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:23:58,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:23:58,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:23:58,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:23:58,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:23:58,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:23:58,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:23:58,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:23:58,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:23:58,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:23:58,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:23:58,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:23:58,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:23:58,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:23:58,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:23:58,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:23:58,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:23:58,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:23:58,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:23:58,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:23:58,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:23:58,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:23:58,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:23:58,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:23:58,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:23:58,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:23:58,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:23:58,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:23:58,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:23:58,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:23:58,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:23:58,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:23:58,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:23:58,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:23:58,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:23:58,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:23:58,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:23:58,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:23:58,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:23:58,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:23:58,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:23:58,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:23:58,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:23:58,440 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:23:58,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:23:58,441 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:23:58,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:23:58,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:23:58,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:23:58,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:23:58,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:23:58,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:23:58,442 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:23:58,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:23:58,442 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:23:58,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:23:58,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:23:58,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:23:58,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:23:58,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:23:58,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:23:58,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:23:58,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:23:58,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:23:58,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:23:58,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:23:58,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:23:58,450 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(__VERIFIER_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 -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-11-28 00:23:58,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:23:58,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:23:58,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:23:58,799 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:23:58,800 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:23:58,801 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2019-11-28 00:23:58,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483d7f51c/4b0943132048409bb676b926ec3ec531/FLAGa8f4156d7 [2019-11-28 00:23:59,394 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:23:59,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2019-11-28 00:23:59,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483d7f51c/4b0943132048409bb676b926ec3ec531/FLAGa8f4156d7 [2019-11-28 00:23:59,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483d7f51c/4b0943132048409bb676b926ec3ec531 [2019-11-28 00:23:59,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:23:59,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:23:59,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:23:59,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:23:59,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:23:59,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:23:59" (1/1) ... [2019-11-28 00:23:59,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a4f9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:23:59, skipping insertion in model container [2019-11-28 00:23:59,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:23:59" (1/1) ... [2019-11-28 00:23:59,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:23:59,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:23:59,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:23:59,992 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:24:00,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:24:00,027 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:24:00,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00 WrapperNode [2019-11-28 00:24:00,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:24:00,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:24:00,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:24:00,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:24:00,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:24:00,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:24:00,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:24:00,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:24:00,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (1/1) ... [2019-11-28 00:24:00,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:24:00,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:24:00,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:24:00,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:24:00,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (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 [2019-11-28 00:24:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:24:00,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:24:00,215 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-28 00:24:00,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-28 00:24:00,430 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:24:00,431 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:24:00,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:00 BoogieIcfgContainer [2019-11-28 00:24:00,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:24:00,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:24:00,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:24:00,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:24:00,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:23:59" (1/3) ... [2019-11-28 00:24:00,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebe3a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:00, skipping insertion in model container [2019-11-28 00:24:00,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:00" (2/3) ... [2019-11-28 00:24:00,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebe3a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:00, skipping insertion in model container [2019-11-28 00:24:00,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:00" (3/3) ... [2019-11-28 00:24:00,451 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-11-28 00:24:00,487 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:24:00,497 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:24:00,524 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:24:00,567 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:24:00,567 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:24:00,567 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:24:00,568 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:24:00,568 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:24:00,568 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:24:00,568 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:24:00,568 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:24:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-28 00:24:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 00:24:00,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:00,595 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:00,596 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-28 00:24:00,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:00,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2537226] [2019-11-28 00:24:00,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:24:00,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2537226] [2019-11-28 00:24:00,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:24:00,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:24:00,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368675794] [2019-11-28 00:24:00,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:24:00,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:00,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:24:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:24:00,832 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-11-28 00:24:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:00,951 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-11-28 00:24:00,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:24:00,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-28 00:24:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:00,964 INFO L225 Difference]: With dead ends: 50 [2019-11-28 00:24:00,965 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 00:24:00,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:24:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 00:24:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-28 00:24:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 00:24:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-28 00:24:01,020 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-28 00:24:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:01,021 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-28 00:24:01,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:24:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-28 00:24:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 00:24:01,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:01,024 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:01,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:01,025 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-28 00:24:01,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:01,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442156684] [2019-11-28 00:24:01,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:24:01,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442156684] [2019-11-28 00:24:01,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598345253] [2019-11-28 00:24:01,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:24:01,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:24:01,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:24:01,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 00:24:01,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977594082] [2019-11-28 00:24:01,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:24:01,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:01,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:24:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:24:01,332 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 8 states. [2019-11-28 00:24:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:01,503 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2019-11-28 00:24:01,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:24:01,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-28 00:24:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:01,509 INFO L225 Difference]: With dead ends: 56 [2019-11-28 00:24:01,510 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 00:24:01,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:24:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 00:24:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 00:24:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 00:24:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-11-28 00:24:01,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2019-11-28 00:24:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:01,527 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-11-28 00:24:01,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:24:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-11-28 00:24:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 00:24:01,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:01,530 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:01,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:01,736 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1741315320, now seen corresponding path program 2 times [2019-11-28 00:24:01,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:01,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807586272] [2019-11-28 00:24:01,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 00:24:01,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807586272] [2019-11-28 00:24:01,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176810105] [2019-11-28 00:24:01,872 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:01,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:24:01,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:24:01,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 00:24:01,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 00:24:01,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:24:01,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-28 00:24:01,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073261383] [2019-11-28 00:24:01,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 00:24:01,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 00:24:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:24:01,956 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 6 states. [2019-11-28 00:24:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:02,033 INFO L93 Difference]: Finished difference Result 58 states and 85 transitions. [2019-11-28 00:24:02,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 00:24:02,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-28 00:24:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:02,039 INFO L225 Difference]: With dead ends: 58 [2019-11-28 00:24:02,039 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 00:24:02,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 00:24:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 00:24:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-28 00:24:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 00:24:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-28 00:24:02,067 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 25 [2019-11-28 00:24:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:02,068 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-28 00:24:02,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 00:24:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-28 00:24:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-28 00:24:02,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:02,071 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:02,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:02,276 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 1 times [2019-11-28 00:24:02,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:02,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081081584] [2019-11-28 00:24:02,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:24:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:24:02,379 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 00:24:02,380 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 00:24:02,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:24:02 BoogieIcfgContainer [2019-11-28 00:24:02,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:24:02,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:24:02,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:24:02,415 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:24:02,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:00" (3/4) ... [2019-11-28 00:24:02,418 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 00:24:02,475 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:24:02,475 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:24:02,478 INFO L168 Benchmark]: Toolchain (without parser) took 2730.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 956.3 MB in the beginning and 995.4 MB in the end (delta: -39.1 MB). Peak memory consumption was 87.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:02,479 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:24:02,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.19 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 944.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:02,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -185.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:02,482 INFO L168 Benchmark]: Boogie Preprocessor took 24.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:02,482 INFO L168 Benchmark]: RCFGBuilder took 286.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:02,483 INFO L168 Benchmark]: TraceAbstraction took 1980.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 995.4 MB in the end (delta: 103.5 MB). Peak memory consumption was 103.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:02,484 INFO L168 Benchmark]: Witness Printer took 61.08 ms. Allocated memory is still 1.2 GB. Free memory is still 995.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:24:02,488 INFO L335 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 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.19 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 944.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 92.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -185.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 286.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1980.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 995.4 MB in the end (delta: 103.5 MB). Peak memory consumption was 103.5 MB. Max. memory is 11.5 GB. * Witness Printer took 61.08 ms. Allocated memory is still 1.2 GB. Free memory is still 995.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) [L39] CALL, EXPR ackermann(m,n) VAL [\old(m)=2, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L18] COND TRUE n==0 VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=1] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L18] COND FALSE !(n==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L21] CALL, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L18] COND TRUE n==0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=0, \old(n)=1] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] return ackermann(m-1,1); [L21] RET, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, m=1, n=1] [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=0, \old(n)=2] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L21] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 58 SDslu, 108 SDs, 0 SdLazy, 129 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 3254 SizeOfPredicates, 4 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 32/38 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...