./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b6c190b845f4496788acb9553cb85e1e7dace14 ......................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:34:16,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:34:16,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:34:16,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:34:16,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:34:16,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:34:16,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:34:16,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:34:16,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:34:16,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:34:16,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:34:16,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:34:16,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:34:16,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:34:16,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:34:16,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:34:16,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:34:16,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:34:16,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:34:16,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:34:16,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:34:16,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:34:16,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:34:16,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:34:16,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:34:16,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:34:16,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:34:16,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:34:16,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:34:16,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:34:16,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:34:16,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:34:16,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:34:16,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:34:16,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:34:16,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:34:16,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:34:16,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:34:16,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:34:16,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:34:16,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:34:16,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:34:16,689 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:34:16,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:34:16,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:34:16,690 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:34:16,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:34:16,691 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:34:16,692 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:34:16,692 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:34:16,692 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:34:16,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:34:16,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:34:16,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:34:16,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:34:16,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:34:16,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:34:16,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:34:16,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:34:16,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:34:16,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:34:16,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:34:16,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:34:16,696 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan 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 -> Taipan 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 [2019-12-07 19:34:16,804 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:34:16,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:34:16,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:34:16,816 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:34:16,817 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:34:16,817 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_o3.c [2019-12-07 19:34:16,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/data/3d7c3cf56/bc04e7f58b444c80883159a8e8ef6c82/FLAG75ef18fff [2019-12-07 19:34:17,263 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:34:17,264 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/sv-benchmarks/c/recursive-simple/id_o3.c [2019-12-07 19:34:17,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/data/3d7c3cf56/bc04e7f58b444c80883159a8e8ef6c82/FLAG75ef18fff [2019-12-07 19:34:17,275 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/data/3d7c3cf56/bc04e7f58b444c80883159a8e8ef6c82 [2019-12-07 19:34:17,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:34:17,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:34:17,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:34:17,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:34:17,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:34:17,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e24b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17, skipping insertion in model container [2019-12-07 19:34:17,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:34:17,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:34:17,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:34:17,394 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:34:17,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:34:17,444 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:34:17,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17 WrapperNode [2019-12-07 19:34:17,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:34:17,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:34:17,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:34:17,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:34:17,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:34:17,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:34:17,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:34:17,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:34:17,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... [2019-12-07 19:34:17,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:34:17,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:34:17,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:34:17,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:34:17,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/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 [2019-12-07 19:34:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:34:17,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:34:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-12-07 19:34:17,518 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-12-07 19:34:17,610 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:34:17,610 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 19:34:17,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:34:17 BoogieIcfgContainer [2019-12-07 19:34:17,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:34:17,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:34:17,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:34:17,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:34:17,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:34:17" (1/3) ... [2019-12-07 19:34:17,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed431e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:34:17, skipping insertion in model container [2019-12-07 19:34:17,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:34:17" (2/3) ... [2019-12-07 19:34:17,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed431e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:34:17, skipping insertion in model container [2019-12-07 19:34:17,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:34:17" (3/3) ... [2019-12-07 19:34:17,615 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2019-12-07 19:34:17,622 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:34:17,626 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:34:17,633 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:34:17,647 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:34:17,647 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:34:17,647 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:34:17,648 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:34:17,648 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:34:17,648 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:34:17,648 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:34:17,648 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:34:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-12-07 19:34:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 19:34:17,661 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:34:17,662 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:34:17,662 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:34:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:34:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 19:34:17,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:34:17,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503625174] [2019-12-07 19:34:17,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:34:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:34:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:34:17,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503625174] [2019-12-07 19:34:17,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:34:17,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 19:34:17,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507401750] [2019-12-07 19:34:17,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:34:17,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:34:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:34:17,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:34:17,844 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2019-12-07 19:34:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:34:17,875 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-12-07 19:34:17,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 19:34:17,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 19:34:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:34:17,882 INFO L225 Difference]: With dead ends: 24 [2019-12-07 19:34:17,882 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 19:34:17,884 INFO L630 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 [2019-12-07 19:34:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 19:34:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 19:34:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 19:34:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 19:34:17,918 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 19:34:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:34:17,919 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 19:34:17,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:34:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 19:34:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 19:34:17,920 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:34:17,920 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:34:17,920 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:34:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:34:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 19:34:17,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:34:17,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074029732] [2019-12-07 19:34:17,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:34:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:34:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:34:17,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074029732] [2019-12-07 19:34:17,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186223971] [2019-12-07 19:34:17,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/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 [2019-12-07 19:34:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:34:18,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 19:34:18,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:34:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:34:18,059 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:34:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:34:18,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747222700] [2019-12-07 19:34:18,182 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-12-07 19:34:18,183 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:34:18,187 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 19:34:18,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:34:18,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-12-07 19:34:18,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637915968] [2019-12-07 19:34:18,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 19:34:18,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:34:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 19:34:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-12-07 19:34:18,190 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 13 states. [2019-12-07 19:34:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:34:18,222 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-12-07 19:34:18,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 19:34:18,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2019-12-07 19:34:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:34:18,223 INFO L225 Difference]: With dead ends: 26 [2019-12-07 19:34:18,223 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 19:34:18,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-12-07 19:34:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 19:34:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 19:34:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 19:34:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 19:34:18,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2019-12-07 19:34:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:34:18,228 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 19:34:18,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 19:34:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 19:34:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 19:34:18,229 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:34:18,229 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:34:18,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:34:18,430 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:34:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:34:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 2 times [2019-12-07 19:34:18,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:34:18,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55275040] [2019-12-07 19:34:18,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:34:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:34:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:34:18,573 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 19:34:18,573 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:34:18,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:34:18 BoogieIcfgContainer [2019-12-07 19:34:18,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:34:18,598 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:34:18,598 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:34:18,598 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:34:18,599 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:34:17" (3/4) ... [2019-12-07 19:34:18,600 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 19:34:18,629 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_59a30244-3406-4d45-89ca-f02f02747395/bin/utaipan/witness.graphml [2019-12-07 19:34:18,630 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:34:18,631 INFO L168 Benchmark]: Toolchain (without parser) took 1352.65 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 948.9 MB in the beginning and 994.1 MB in the end (delta: -45.2 MB). Peak memory consumption was 51.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:34:18,632 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:34:18,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:34:18,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.63 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:34:18,633 INFO L168 Benchmark]: Boogie Preprocessor took 10.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:34:18,633 INFO L168 Benchmark]: RCFGBuilder took 133.73 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 19:34:18,633 INFO L168 Benchmark]: TraceAbstraction took 986.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 999.5 MB in the end (delta: 75.8 MB). Peak memory consumption was 75.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:34:18,634 INFO L168 Benchmark]: Witness Printer took 31.80 ms. Allocated memory is still 1.1 GB. Free memory was 999.5 MB in the beginning and 994.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:34:18,635 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.63 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 133.73 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 986.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 999.5 MB in the end (delta: 75.8 MB). Peak memory consumption was 75.8 MB. Max. memory is 11.5 GB. * Witness Printer took 31.80 ms. Allocated memory is still 1.1 GB. Free memory was 999.5 MB in the beginning and 994.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 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, 14 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 2 SDslu, 136 SDs, 0 SdLazy, 45 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 2650 SizeOfPredicates, 1 NumberOfNonLiveVariables, 34 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 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...