./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o3.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-simple/id_o3.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 9b6c190b845f4496788acb9553cb85e1e7dace14 ................................................................................................................................................................................................................................................................................................................................................................................................ 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 17:30:06,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:30:06,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:30:06,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:30:06,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:30:06,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:30:06,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:30:06,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:30:06,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:30:06,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:30:06,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:30:06,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:30:06,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:30:06,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:30:06,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:30:06,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:30:06,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:30:06,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:30:06,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:30:06,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:30:06,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:30:06,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:30:06,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:30:06,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:30:06,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:30:06,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:30:06,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:30:06,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:30:06,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:30:06,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:30:06,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:30:06,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:30:06,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:30:06,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:30:06,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:30:06,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:30:06,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:30:06,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:30:06,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:30:06,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:30:06,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:30:06,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:30:06,391 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:30:06,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:30:06,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:30:06,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:30:06,395 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:30:06,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:30:06,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:30:06,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:30:06,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:30:06,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:30:06,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:30:06,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:30:06,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:30:06,397 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:30:06,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:30:06,398 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:30:06,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:30:06,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:30:06,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:30:06,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:30:06,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:30:06,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:30:06,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:30:06,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:30:06,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:30:06,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:30:06,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:30:06,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:30:06,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:30:06,404 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 -> 9b6c190b845f4496788acb9553cb85e1e7dace14 [2019-11-28 17:30:06,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:30:06,736 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:30:06,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:30:06,742 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:30:06,742 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:30:06,743 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-28 17:30:06,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bf6851f/67c4003c043f4b7d9538ed5f6849f4b1/FLAGde8e054ce [2019-11-28 17:30:07,242 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:30:07,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-28 17:30:07,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bf6851f/67c4003c043f4b7d9538ed5f6849f4b1/FLAGde8e054ce [2019-11-28 17:30:07,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bf6851f/67c4003c043f4b7d9538ed5f6849f4b1 [2019-11-28 17:30:07,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:30:07,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:30:07,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:30:07,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:30:07,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:30:07,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6256c009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07, skipping insertion in model container [2019-11-28 17:30:07,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:30:07,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:30:07,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:30:07,868 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:30:07,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:30:07,890 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:30:07,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07 WrapperNode [2019-11-28 17:30:07,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:30:07,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:30:07,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:30:07,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:30:07,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:30:07,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:30:07,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:30:07,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:30:07,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (1/1) ... [2019-11-28 17:30:07,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:30:07,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:30:07,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:30:07,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:30:07,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (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 17:30:08,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:30:08,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:30:08,044 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 17:30:08,044 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 17:30:08,187 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:30:08,188 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:30:08,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:08 BoogieIcfgContainer [2019-11-28 17:30:08,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:30:08,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:30:08,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:30:08,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:30:08,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:30:07" (1/3) ... [2019-11-28 17:30:08,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5710354f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:30:08, skipping insertion in model container [2019-11-28 17:30:08,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:07" (2/3) ... [2019-11-28 17:30:08,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5710354f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:30:08, skipping insertion in model container [2019-11-28 17:30:08,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:08" (3/3) ... [2019-11-28 17:30:08,196 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2019-11-28 17:30:08,204 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:30:08,210 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:30:08,221 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:30:08,245 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:30:08,245 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:30:08,245 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:30:08,245 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:30:08,246 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:30:08,246 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:30:08,246 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:30:08,246 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:30:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 17:30:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:30:08,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:08,268 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:08,268 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 17:30:08,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:08,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754557437] [2019-11-28 17:30:08,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,679 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-11-28 17:30:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,737 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 17:30:08,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754557437] [2019-11-28 17:30:08,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:30:08,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:30:08,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603988244] [2019-11-28 17:30:08,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:30:08,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:30:08,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:30:08,763 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 17:30:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:08,819 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-28 17:30:08,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:30:08,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:30:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:08,832 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:30:08,832 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:30:08,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:30:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:30:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 17:30:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:30:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 17:30:08,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 17:30:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:08,877 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 17:30:08,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:30:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 17:30:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:30:08,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:08,879 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:08,880 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 17:30:08,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:08,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301112769] [2019-11-28 17:30:08,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,066 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 17:30:09,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301112769] [2019-11-28 17:30:09,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009082317] [2019-11-28 17:30:09,067 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 17:30:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:30:09,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:09,186 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 17:30:09,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:09,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 17:30:09,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431555588] [2019-11-28 17:30:09,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:30:09,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:09,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:30:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:30:09,193 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 17:30:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:09,238 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 17:30:09,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:30:09,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 17:30:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:09,240 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:30:09,240 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:30:09,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:30:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:30:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:30:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:30:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 17:30:09,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 17:30:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:09,248 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 17:30:09,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:30:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 17:30:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:30:09,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:09,249 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:09,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:09,456 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 17:30:09,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:09,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817908258] [2019-11-28 17:30:09,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:30:09,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817908258] [2019-11-28 17:30:09,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137621638] [2019-11-28 17:30:09,705 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 17:30:09,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:09,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:09,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:30:09,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:30:09,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:09,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 17:30:09,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442714091] [2019-11-28 17:30:09,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:30:09,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:30:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:30:09,791 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-28 17:30:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:09,849 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:30:09,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:30:09,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-28 17:30:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:09,851 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:30:09,852 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:30:09,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:30:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:30:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:30:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:30:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 17:30:09,859 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 17:30:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:09,859 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 17:30:09,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:30:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 17:30:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:30:09,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:09,861 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:10,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:10,065 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 17:30:10,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:10,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003918015] [2019-11-28 17:30:10,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:30:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:30:10,145 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:30:10,146 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:30:10,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:30:10 BoogieIcfgContainer [2019-11-28 17:30:10,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:30:10,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:30:10,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:30:10,185 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:30:10,185 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:08" (3/4) ... [2019-11-28 17:30:10,188 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:30:10,262 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:30:10,263 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:30:10,265 INFO L168 Benchmark]: Toolchain (without parser) took 2587.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 957.7 MB in the beginning and 1.0 GB in the end (delta: -57.7 MB). Peak memory consumption was 86.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:10,265 INFO L168 Benchmark]: CDTParser took 0.29 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 17:30:10,266 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.07 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:10,267 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -194.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:10,267 INFO L168 Benchmark]: Boogie Preprocessor took 19.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:10,268 INFO L168 Benchmark]: RCFGBuilder took 198.52 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:10,268 INFO L168 Benchmark]: TraceAbstraction took 1994.02 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: 94.9 MB). Peak memory consumption was 94.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:10,269 INFO L168 Benchmark]: Witness Printer took 78.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:10,273 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 212.07 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 79.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -194.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 198.52 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1994.02 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: 94.9 MB). Peak memory consumption was 94.9 MB. Max. memory is 11.5 GB. * Witness Printer took 78.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 3 SDslu, 207 SDs, 0 SdLazy, 69 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 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...