./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 f470102c 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 0.1.25-f470102 [2019-11-28 17:28:05,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:28:05,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:28:05,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:28:05,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:28:05,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:28:05,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:28:05,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:28:05,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:28:05,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:28:05,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:28:05,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:28:05,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:28:05,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:28:05,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:28:05,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:28:05,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:28:05,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:28:05,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:28:05,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:28:06,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:28:06,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:28:06,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:28:06,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:28:06,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:28:06,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:28:06,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:28:06,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:28:06,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:28:06,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:28:06,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:28:06,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:28:06,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:28:06,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:28:06,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:28:06,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:28:06,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:28:06,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:28:06,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:28:06,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:28:06,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:28:06,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:28:06,044 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:28:06,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:28:06,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:28:06,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:28:06,047 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:28:06,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:28:06,048 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:28:06,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:28:06,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:28:06,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:28:06,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:28:06,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:28:06,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:28:06,050 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:28:06,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:28:06,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:28:06,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:28:06,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:28:06,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:28:06,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:28:06,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:28:06,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:28:06,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:28:06,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:28:06,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:28:06,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:28:06,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:28:06,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:28:06,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:28:06,053 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 17:28:06,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:28:06,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:28:06,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:28:06,387 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:28:06,387 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:28:06,388 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2019-11-28 17:28:06,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/590484fbd/64ed71d8df47484b9268eecd541967d0/FLAGda28665c4 [2019-11-28 17:28:06,909 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:28:06,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2019-11-28 17:28:06,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/590484fbd/64ed71d8df47484b9268eecd541967d0/FLAGda28665c4 [2019-11-28 17:28:07,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/590484fbd/64ed71d8df47484b9268eecd541967d0 [2019-11-28 17:28:07,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:28:07,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:28:07,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:07,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:28:07,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:28:07,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bbc6ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07, skipping insertion in model container [2019-11-28 17:28:07,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:28:07,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:28:07,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:07,485 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:28:07,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:07,517 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:28:07,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07 WrapperNode [2019-11-28 17:28:07,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:07,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:07,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:28:07,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:28:07,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:07,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:28:07,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:28:07,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:28:07,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (1/1) ... [2019-11-28 17:28:07,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:28:07,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:28:07,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:28:07,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:28:07,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (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 17:28:07,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:28:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:28:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-28 17:28:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-28 17:28:07,880 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:28:07,882 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:28:07,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:07 BoogieIcfgContainer [2019-11-28 17:28:07,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:28:07,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:28:07,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:28:07,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:28:07,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:28:07" (1/3) ... [2019-11-28 17:28:07,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaf5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:07, skipping insertion in model container [2019-11-28 17:28:07,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:07" (2/3) ... [2019-11-28 17:28:07,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaf5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:07, skipping insertion in model container [2019-11-28 17:28:07,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:07" (3/3) ... [2019-11-28 17:28:07,915 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-11-28 17:28:07,929 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:28:07,957 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:28:07,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:28:08,028 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:28:08,029 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:28:08,029 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:28:08,029 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:28:08,029 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:28:08,029 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:28:08,030 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:28:08,030 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:28:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-28 17:28:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 17:28:08,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:08,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:08,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-28 17:28:08,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:08,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420131044] [2019-11-28 17:28:08,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:08,291 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 17:28:08,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420131044] [2019-11-28 17:28:08,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:28:08,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:28:08,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702773431] [2019-11-28 17:28:08,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:28:08,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:28:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:28:08,330 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-11-28 17:28:08,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:08,516 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-11-28 17:28:08,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:28:08,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-28 17:28:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:08,532 INFO L225 Difference]: With dead ends: 50 [2019-11-28 17:28:08,533 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 17:28:08,538 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 17:28:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 17:28:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-28 17:28:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 17:28:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-28 17:28:08,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-28 17:28:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:08,586 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-28 17:28:08,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:28:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-28 17:28:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:28:08,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:08,593 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:08,594 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:08,594 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-28 17:28:08,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:08,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889888197] [2019-11-28 17:28:08,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:08,767 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 17:28:08,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889888197] [2019-11-28 17:28:08,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919705156] [2019-11-28 17:28:08,768 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 17:28:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:08,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:28:08,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:08,891 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 17:28:08,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:08,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 17:28:08,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181566105] [2019-11-28 17:28:08,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:28:08,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:08,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:28:08,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:28:08,899 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 8 states. [2019-11-28 17:28:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:09,075 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2019-11-28 17:28:09,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:28:09,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-28 17:28:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:09,078 INFO L225 Difference]: With dead ends: 56 [2019-11-28 17:28:09,078 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:28:09,080 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 17:28:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:28:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 17:28:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:28:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-11-28 17:28:09,092 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2019-11-28 17:28:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:09,092 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-11-28 17:28:09,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:28:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-11-28 17:28:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 17:28:09,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:09,097 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:09,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:09,304 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1741315320, now seen corresponding path program 2 times [2019-11-28 17:28:09,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:09,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943722131] [2019-11-28 17:28:09,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:09,408 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 17:28:09,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943722131] [2019-11-28 17:28:09,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782761703] [2019-11-28 17:28:09,410 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 17:28:09,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:28:09,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:28:09,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 17:28:09,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:09,486 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 17:28:09,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:09,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-28 17:28:09,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546245824] [2019-11-28 17:28:09,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:28:09,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:09,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:28:09,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:28:09,489 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 6 states. [2019-11-28 17:28:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:09,554 INFO L93 Difference]: Finished difference Result 58 states and 85 transitions. [2019-11-28 17:28:09,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:28:09,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-28 17:28:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:09,556 INFO L225 Difference]: With dead ends: 58 [2019-11-28 17:28:09,556 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 17:28:09,559 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 17:28:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 17:28:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-28 17:28:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 17:28:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-28 17:28:09,581 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 25 [2019-11-28 17:28:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:09,581 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-28 17:28:09,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:28:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-28 17:28:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-28 17:28:09,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:09,585 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 17:28:09,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:09,787 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:09,788 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 1 times [2019-11-28 17:28:09,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:09,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852470679] [2019-11-28 17:28:09,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:28:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:28:09,876 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:28:09,877 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:28:09,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:28:09 BoogieIcfgContainer [2019-11-28 17:28:09,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:28:09,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:28:09,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:28:09,913 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:28:09,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:07" (3/4) ... [2019-11-28 17:28:09,915 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:28:09,972 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:28:09,972 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:28:09,975 INFO L168 Benchmark]: Toolchain (without parser) took 2686.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 960.4 MB in the beginning and 1.0 GB in the end (delta: -47.4 MB). Peak memory consumption was 88.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:09,976 INFO L168 Benchmark]: CDTParser took 0.70 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 17:28:09,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.66 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:09,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:09,979 INFO L168 Benchmark]: Boogie Preprocessor took 17.62 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:09,979 INFO L168 Benchmark]: RCFGBuilder took 261.83 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: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:09,980 INFO L168 Benchmark]: TraceAbstraction took 2025.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.5 MB). Peak memory consumption was 104.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:09,981 INFO L168 Benchmark]: Witness Printer took 59.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:28:09,985 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 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 227.66 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 86.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.62 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 261.83 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: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2025.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.5 MB). Peak memory consumption was 104.5 MB. Max. memory is 11.5 GB. * Witness Printer took 59.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s 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...