./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer --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 0.1.23-5842f4b [2018-11-18 12:14:19,593 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:14:19,594 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:14:19,602 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:14:19,602 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:14:19,603 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:14:19,604 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:14:19,605 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:14:19,606 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:14:19,607 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:14:19,608 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:14:19,608 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:14:19,608 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:14:19,609 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:14:19,610 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:14:19,611 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:14:19,611 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:14:19,613 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:14:19,614 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:14:19,615 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:14:19,616 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:14:19,617 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:14:19,619 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:14:19,619 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:14:19,619 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:14:19,620 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:14:19,621 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:14:19,621 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:14:19,622 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:14:19,623 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:14:19,623 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:14:19,623 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:14:19,623 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:14:19,624 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:14:19,624 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:14:19,625 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:14:19,625 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 12:14:19,636 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:14:19,636 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:14:19,637 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:14:19,637 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 12:14:19,637 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:14:19,637 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:14:19,638 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:14:19,638 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:14:19,638 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:14:19,638 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:14:19,638 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:14:19,638 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:14:19,639 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:14:19,640 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:14:19,640 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:14:19,640 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:14:19,640 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:14:19,640 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:14:19,640 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:14:19,641 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:14:19,641 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:14:19,641 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:14:19,641 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:14:19,641 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:14:19,641 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer 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 [2018-11-18 12:14:19,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:14:19,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:14:19,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:14:19,672 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:14:19,672 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:14:19,672 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 12:14:19,717 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/data/59def809d/68e125d850e846ccabbf8ce07f1f9b71/FLAG6cc62447e [2018-11-18 12:14:20,065 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:14:20,066 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 12:14:20,071 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/data/59def809d/68e125d850e846ccabbf8ce07f1f9b71/FLAG6cc62447e [2018-11-18 12:14:20,475 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/data/59def809d/68e125d850e846ccabbf8ce07f1f9b71 [2018-11-18 12:14:20,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:14:20,478 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:14:20,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:14:20,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:14:20,482 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:14:20,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@837c9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20, skipping insertion in model container [2018-11-18 12:14:20,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:14:20,501 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:14:20,604 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:14:20,606 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:14:20,617 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:14:20,625 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:14:20,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20 WrapperNode [2018-11-18 12:14:20,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:14:20,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:14:20,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:14:20,626 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:14:20,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... [2018-11-18 12:14:20,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:14:20,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:14:20,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:14:20,642 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:14:20,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/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 [2018-11-18 12:14:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:14:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:14:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 12:14:20,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:14:20,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-18 12:14:20,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:14:20,716 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 12:14:20,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:14:20,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:14:20,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:14:20,799 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:14:20,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:14:20 BoogieIcfgContainer [2018-11-18 12:14:20,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:14:20,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:14:20,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:14:20,803 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:14:20,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:14:20" (1/3) ... [2018-11-18 12:14:20,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c50902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:14:20, skipping insertion in model container [2018-11-18 12:14:20,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:20" (2/3) ... [2018-11-18 12:14:20,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c50902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:14:20, skipping insertion in model container [2018-11-18 12:14:20,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:14:20" (3/3) ... [2018-11-18 12:14:20,805 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 12:14:20,811 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:14:20,815 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:14:20,824 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:14:20,842 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:14:20,843 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:14:20,843 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:14:20,843 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:14:20,843 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:14:20,843 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:14:20,843 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:14:20,843 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:14:20,843 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:14:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 12:14:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 12:14:20,859 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:20,860 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:20,861 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:20,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:20,865 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 12:14:20,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:14:20,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:14:20,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:20,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:20,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:14:21,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:14:21,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:14:21,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:14:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:14:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:14:21,030 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 12:14:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:21,063 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-18 12:14:21,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:14:21,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 12:14:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:21,071 INFO L225 Difference]: With dead ends: 32 [2018-11-18 12:14:21,071 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 12:14:21,073 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:14:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 12:14:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 12:14:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 12:14:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 12:14:21,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 12:14:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:21,098 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 12:14:21,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:14:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 12:14:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 12:14:21,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:21,099 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:21,100 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:21,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 12:14:21,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:14:21,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:14:21,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:21,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:21,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:21,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:21,230 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:14:21,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:21,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:14:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:21,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:14:21,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-18 12:14:21,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:14:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:14:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:14:21,323 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-11-18 12:14:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:21,350 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 12:14:21,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:14:21,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-11-18 12:14:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:21,351 INFO L225 Difference]: With dead ends: 25 [2018-11-18 12:14:21,351 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 12:14:21,351 INFO L604 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 [2018-11-18 12:14:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 12:14:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 12:14:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 12:14:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 12:14:21,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 12:14:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:21,356 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 12:14:21,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:14:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 12:14:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 12:14:21,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:21,357 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:21,357 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:21,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 12:14:21,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:14:21,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:14:21,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:21,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 12:14:21,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:21,476 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:14:21,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:14:21,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:14:21,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:14:21,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:14:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 12:14:21,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:14:21,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-18 12:14:21,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 12:14:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 12:14:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:14:21,573 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-11-18 12:14:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:21,600 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 12:14:21,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:14:21,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-11-18 12:14:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:21,601 INFO L225 Difference]: With dead ends: 28 [2018-11-18 12:14:21,601 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 12:14:21,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:14:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 12:14:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 12:14:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:14:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 12:14:21,605 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 12:14:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:21,606 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 12:14:21,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 12:14:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 12:14:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 12:14:21,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:21,607 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:21,607 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:21,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 12:14:21,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:14:21,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:14:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:21,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:14:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:14:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:14:21,646 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 12:14:21,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:14:21 BoogieIcfgContainer [2018-11-18 12:14:21,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:14:21,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:14:21,666 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:14:21,666 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:14:21,666 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:14:20" (3/4) ... [2018-11-18 12:14:21,668 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 12:14:21,697 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ac2b0920-5618-4d4c-860c-c73f9d1e3efe/bin-2019/uautomizer/witness.graphml [2018-11-18 12:14:21,697 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:14:21,698 INFO L168 Benchmark]: Toolchain (without parser) took 1219.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 959.1 MB in the beginning and 1.0 GB in the end (delta: -86.3 MB). Peak memory consumption was 62.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:21,699 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:14:21,699 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.87 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:21,700 INFO L168 Benchmark]: Boogie Preprocessor took 15.64 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:21,700 INFO L168 Benchmark]: RCFGBuilder took 158.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -190.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:21,701 INFO L168 Benchmark]: TraceAbstraction took 864.61 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: 87.7 MB). Peak memory consumption was 87.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:21,701 INFO L168 Benchmark]: Witness Printer took 31.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:14:21,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.87 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.64 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 158.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -190.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 864.61 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: 87.7 MB). Peak memory consumption was 87.7 MB. Max. memory is 11.5 GB. * Witness Printer took 31.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=3, input=3] [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 VAL [input=3, result=3] [L13] __VERIFIER_error() VAL [input=3, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 2 SDslu, 270 SDs, 0 SdLazy, 58 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 6840 SizeOfPredicates, 2 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...