./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 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-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 0.1.24-30f4e4a [2019-11-28 00:25:57,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:57,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:57,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:57,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:57,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:57,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:57,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:57,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:57,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:57,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:57,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:57,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:57,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:57,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:57,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:57,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:57,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:57,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:57,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:57,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:57,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:57,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:57,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:57,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:57,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:57,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:57,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:57,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:57,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:57,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:57,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:57,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:57,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:57,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:57,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:57,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:57,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:57,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:57,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:57,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:57,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:57,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:57,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:57,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:57,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:57,806 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:57,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:57,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:57,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:57,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:57,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:57,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:57,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:57,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:57,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:57,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:57,809 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:57,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:57,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:57,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:57,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:57,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:57,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:57,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:57,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:57,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:57,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:57,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:57,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:57,813 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 00:25:58,138 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:58,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:58,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:58,157 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:58,157 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:58,158 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-28 00:25:58,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817de7c7e/83b8f98e63e54fba8675962cd783320e/FLAGbc6ffd5d3 [2019-11-28 00:25:58,690 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:58,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-28 00:25:58,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817de7c7e/83b8f98e63e54fba8675962cd783320e/FLAGbc6ffd5d3 [2019-11-28 00:25:59,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817de7c7e/83b8f98e63e54fba8675962cd783320e [2019-11-28 00:25:59,078 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:59,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:59,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:59,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:59,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:59,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc2ffad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59, skipping insertion in model container [2019-11-28 00:25:59,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:59,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:59,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:59,297 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:59,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:59,334 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:59,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59 WrapperNode [2019-11-28 00:25:59,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:59,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:59,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:59,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:59,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:59,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:59,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:59,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:59,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... [2019-11-28 00:25:59,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:59,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:59,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:59,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:59,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:59,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 00:25:59,479 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 00:25:59,632 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:59,632 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:59,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:59 BoogieIcfgContainer [2019-11-28 00:25:59,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:59,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:59,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:59,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:59,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:59" (1/3) ... [2019-11-28 00:25:59,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc710b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:59, skipping insertion in model container [2019-11-28 00:25:59,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:59" (2/3) ... [2019-11-28 00:25:59,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc710b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:59, skipping insertion in model container [2019-11-28 00:25:59,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:59" (3/3) ... [2019-11-28 00:25:59,641 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2019-11-28 00:25:59,652 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:59,660 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:59,672 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:59,696 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:59,696 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:59,697 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:59,697 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:59,697 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:59,697 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:59,697 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:59,698 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 00:25:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:59,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:59,720 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:59,720 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 00:25:59,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:59,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072379906] [2019-11-28 00:25:59,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:26:00,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072379906] [2019-11-28 00:26:00,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:26:00,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:26:00,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797384296] [2019-11-28 00:26:00,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:26:00,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:00,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:26:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:26:00,096 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 00:26:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:00,150 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-28 00:26:00,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:26:00,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 00:26:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:00,162 INFO L225 Difference]: With dead ends: 27 [2019-11-28 00:26:00,162 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 00:26:00,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:26:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 00:26:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 00:26:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 00:26:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 00:26:00,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 00:26:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:00,199 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 00:26:00,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:26:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 00:26:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 00:26:00,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:00,201 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:00,202 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 00:26:00,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:00,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785648549] [2019-11-28 00:26:00,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:26:00,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785648549] [2019-11-28 00:26:00,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302484999] [2019-11-28 00:26:00,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 00:26:00,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:26:00,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:26:00,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 00:26:00,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288859892] [2019-11-28 00:26:00,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:26:00,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:26:00,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:26:00,534 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 00:26:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:00,589 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 00:26:00,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:26:00,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 00:26:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:00,591 INFO L225 Difference]: With dead ends: 21 [2019-11-28 00:26:00,591 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:26:00,592 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 00:26:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:26:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:26:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:26:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 00:26:00,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 00:26:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:00,599 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 00:26:00,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:26:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 00:26:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 00:26:00,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:00,601 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:00,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:00,816 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 00:26:00,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:00,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278739709] [2019-11-28 00:26:00,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,078 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 00:26:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278739709] [2019-11-28 00:26:01,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013130610] [2019-11-28 00:26:01,082 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:01,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:26:01,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:26:01,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 00:26:01,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:01,186 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 00:26:01,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:26:01,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 00:26:01,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484896545] [2019-11-28 00:26:01,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:26:01,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:01,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:26:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:26:01,190 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-28 00:26:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:01,244 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 00:26:01,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 00:26:01,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-28 00:26:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:01,246 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:26:01,246 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:26:01,247 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 00:26:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:26:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:26:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:26:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 00:26:01,255 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 00:26:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:01,255 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 00:26:01,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:26:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 00:26:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 00:26:01,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:01,258 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:01,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:01,468 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 00:26:01,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:01,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616545981] [2019-11-28 00:26:01,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:26:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:26:01,555 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 00:26:01,555 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 00:26:01,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:26:01 BoogieIcfgContainer [2019-11-28 00:26:01,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:26:01,586 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:26:01,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:26:01,587 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:26:01,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:59" (3/4) ... [2019-11-28 00:26:01,590 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 00:26:01,655 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:26:01,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:26:01,658 INFO L168 Benchmark]: Toolchain (without parser) took 2577.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 960.4 MB in the beginning and 1.0 GB in the end (delta: -54.6 MB). Peak memory consumption was 87.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:01,659 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:26:01,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.72 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 00:26:01,663 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.86 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:26:01,664 INFO L168 Benchmark]: Boogie Preprocessor took 66.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -189.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:01,666 INFO L168 Benchmark]: RCFGBuilder took 202.66 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:01,671 INFO L168 Benchmark]: TraceAbstraction took 1951.65 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: 98.8 MB). Peak memory consumption was 98.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:01,674 INFO L168 Benchmark]: Witness Printer took 69.67 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:01,678 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 253.72 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 27.86 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 66.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -189.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 202.66 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1951.65 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: 98.8 MB). Peak memory consumption was 98.8 MB. Max. memory is 11.5 GB. * Witness Printer took 69.67 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: 6.6 MB). Peak memory consumption was 6.6 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: 1.8s, 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, 0.4s 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, 0.1s SatisfiabilityAnalysisTime, 0.7s 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...