./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 3bf945356a28265a842df89cdbf40bfa9a223140 .................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 3bf945356a28265a842df89cdbf40bfa9a223140 ................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:45:57,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:45:57,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:45:57,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:45:57,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:45:57,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:45:57,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:45:57,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:45:57,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:45:57,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:45:57,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:45:57,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:45:57,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:45:57,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:45:57,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:45:57,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:45:57,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:45:57,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:45:57,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:45:57,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:45:57,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:45:57,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:45:57,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:45:57,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:45:57,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:45:57,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:45:57,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:45:57,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:45:57,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:45:57,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:45:57,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:45:57,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:45:57,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:45:57,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:45:57,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:45:57,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:45:57,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:45:57,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:45:57,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:45:57,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:45:57,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:45:57,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:45:57,276 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:45:57,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:45:57,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:45:57,277 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:45:57,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:45:57,277 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:45:57,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:45:57,277 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:45:57,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:45:57,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:45:57,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:45:57,278 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:45:57,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:45:57,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:45:57,279 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:45:57,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:45:57,279 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:45:57,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:45:57,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:45:57,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:45:57,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:45:57,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:45:57,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:45:57,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:45:57,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:45:57,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:45:57,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:45:57,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:45:57,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:45:57,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:45:57,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:45:57,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:45:57,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:45:57,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:45:57,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:45:57,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:45:57,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:45:57,283 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_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 -> 3bf945356a28265a842df89cdbf40bfa9a223140 [2019-11-26 02:45:57,459 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:45:57,470 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:45:57,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:45:57,474 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:45:57,474 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:45:57,475 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2019-11-26 02:45:57,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/55dee753e/fe5a1d2178454d708dfe3aace9aa7d22/FLAG63a377200 [2019-11-26 02:45:57,907 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:45:57,907 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2019-11-26 02:45:57,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/55dee753e/fe5a1d2178454d708dfe3aace9aa7d22/FLAG63a377200 [2019-11-26 02:45:57,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/55dee753e/fe5a1d2178454d708dfe3aace9aa7d22 [2019-11-26 02:45:57,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:45:57,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:45:57,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:45:57,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:45:57,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:45:57,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:45:57" (1/1) ... [2019-11-26 02:45:57,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760bc1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:57, skipping insertion in model container [2019-11-26 02:45:57,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:45:57" (1/1) ... [2019-11-26 02:45:57,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:45:57,951 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:45:58,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:45:58,134 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:45:58,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:45:58,229 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:45:58,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58 WrapperNode [2019-11-26 02:45:58,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:45:58,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:45:58,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:45:58,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:45:58,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:45:58,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:45:58,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:45:58,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:45:58,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... [2019-11-26 02:45:58,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:45:58,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:45:58,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:45:58,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:45:58,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 [2019-11-26 02:45:58,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:45:58,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:45:58,321 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:45:58,321 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:45:58,538 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:45:58,538 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:45:58,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:45:58 BoogieIcfgContainer [2019-11-26 02:45:58,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:45:58,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:45:58,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:45:58,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:45:58,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:45:57" (1/3) ... [2019-11-26 02:45:58,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314ff19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:45:58, skipping insertion in model container [2019-11-26 02:45:58,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:45:58" (2/3) ... [2019-11-26 02:45:58,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314ff19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:45:58, skipping insertion in model container [2019-11-26 02:45:58,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:45:58" (3/3) ... [2019-11-26 02:45:58,547 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2019-11-26 02:45:58,556 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:45:58,561 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:45:58,569 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:45:58,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:45:58,588 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:45:58,588 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:45:58,588 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:45:58,588 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:45:58,588 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:45:58,589 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:45:58,589 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:45:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-26 02:45:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:45:58,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:45:58,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:45:58,611 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:45:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:45:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times [2019-11-26 02:45:58,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:45:58,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570974953] [2019-11-26 02:45:58,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:45:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:45:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:45:58,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570974953] [2019-11-26 02:45:58,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:45:58,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:45:58,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75261307] [2019-11-26 02:45:58,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:45:58,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:45:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:45:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:45:58,765 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2019-11-26 02:45:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:45:58,840 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-26 02:45:58,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:45:58,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:45:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:45:58,849 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:45:58,849 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:45:58,852 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 [2019-11-26 02:45:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:45:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:45:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:45:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:45:58,887 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:45:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:45:58,887 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:45:58,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:45:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:45:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:45:58,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:45:58,889 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:45:58,890 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:45:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:45:58,890 INFO L82 PathProgramCache]: Analyzing trace with hash 777549959, now seen corresponding path program 1 times [2019-11-26 02:45:58,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:45:58,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834837295] [2019-11-26 02:45:58,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:45:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:45:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:45:59,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834837295] [2019-11-26 02:45:59,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145030827] [2019-11-26 02:45:59,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 [2019-11-26 02:45:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:45:59,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:45:59,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:45:59,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:45:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:45:59,215 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:45:59,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:45:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:45:59,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016412756] [2019-11-26 02:45:59,448 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-26 02:45:59,454 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:45:59,460 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:45:59,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:45:59,664 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an 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.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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) [2019-11-26 02:45:59,668 INFO L168 Benchmark]: Toolchain (without parser) took 1743.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -110.7 MB). Peak memory consumption was 37.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:45:59,669 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:45:59,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -200.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:45:59,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:45:59,671 INFO L168 Benchmark]: Boogie Preprocessor took 14.22 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:45:59,671 INFO L168 Benchmark]: RCFGBuilder took 268.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:45:59,672 INFO L168 Benchmark]: TraceAbstraction took 1126.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:45:59,675 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 305.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -200.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.22 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 268.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1126.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:46:01,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:46:01,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:46:01,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:46:01,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:46:01,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:46:01,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:46:01,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:46:01,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:46:01,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:46:01,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:46:01,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:46:01,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:46:01,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:46:01,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:46:01,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:46:01,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:46:01,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:46:01,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:46:01,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:46:01,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:46:01,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:46:01,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:46:01,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:46:01,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:46:01,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:46:01,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:46:01,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:46:01,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:46:01,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:46:01,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:46:01,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:46:01,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:46:01,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:46:01,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:46:01,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:46:01,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:46:01,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:46:01,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:46:01,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:46:01,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:46:01,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:46:01,478 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:46:01,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:46:01,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:46:01,479 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:46:01,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:46:01,479 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:46:01,480 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:46:01,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:46:01,481 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:46:01,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:46:01,490 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:46:01,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:46:01,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:46:01,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:46:01,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:46:01,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:46:01,491 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:46:01,491 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:46:01,492 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:46:01,492 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:46:01,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:46:01,492 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:46:01,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:46:01,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:46:01,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:46:01,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:46:01,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:46:01,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:46:01,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:46:01,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:46:01,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:46:01,495 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:46:01,495 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:46:01,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:46:01,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:46:01,496 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 -> 3bf945356a28265a842df89cdbf40bfa9a223140 [2019-11-26 02:46:01,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:46:01,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:46:01,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:46:01,860 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:46:01,861 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:46:01,861 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2019-11-26 02:46:01,910 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/c8b473e51/57280f8758bf42aeb7f522823732257c/FLAG1d0877284 [2019-11-26 02:46:02,300 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:46:02,301 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2019-11-26 02:46:02,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/c8b473e51/57280f8758bf42aeb7f522823732257c/FLAG1d0877284 [2019-11-26 02:46:02,320 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/data/c8b473e51/57280f8758bf42aeb7f522823732257c [2019-11-26 02:46:02,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:46:02,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:46:02,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:46:02,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:46:02,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:46:02,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f084421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02, skipping insertion in model container [2019-11-26 02:46:02,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:46:02,363 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:46:02,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:46:02,497 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:46:02,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:46:02,523 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:46:02,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02 WrapperNode [2019-11-26 02:46:02,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:46:02,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:46:02,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:46:02,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:46:02,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:46:02,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:46:02,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:46:02,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:46:02,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... [2019-11-26 02:46:02,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:46:02,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:46:02,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:46:02,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:46:02,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/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 [2019-11-26 02:46:02,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:46:02,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:46:02,656 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:46:02,657 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:46:02,808 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:46:02,808 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:46:02,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:46:02 BoogieIcfgContainer [2019-11-26 02:46:02,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:46:02,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:46:02,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:46:02,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:46:02,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:46:02" (1/3) ... [2019-11-26 02:46:02,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea3926e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:46:02, skipping insertion in model container [2019-11-26 02:46:02,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:02" (2/3) ... [2019-11-26 02:46:02,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea3926e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:46:02, skipping insertion in model container [2019-11-26 02:46:02,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:46:02" (3/3) ... [2019-11-26 02:46:02,814 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2019-11-26 02:46:02,834 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:46:02,850 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:46:02,860 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:46:02,882 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:46:02,882 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:46:02,882 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:46:02,882 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:46:02,883 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:46:02,883 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:46:02,883 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:46:02,883 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:46:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-26 02:46:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:46:02,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:02,905 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:46:02,906 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:02,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times [2019-11-26 02:46:02,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:46:02,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1196865195] [2019-11-26 02:46:02,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:46:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:46:02,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:46:02,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:46:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:03,055 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:46:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:03,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196865195] [2019-11-26 02:46:03,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:46:03,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-26 02:46:03,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852370445] [2019-11-26 02:46:03,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:46:03,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:46:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:46:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:46:03,155 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 8 states. [2019-11-26 02:46:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:46:03,215 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-26 02:46:03,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:46:03,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-26 02:46:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:46:03,224 INFO L225 Difference]: With dead ends: 32 [2019-11-26 02:46:03,225 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:46:03,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:46:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:46:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-26 02:46:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-26 02:46:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-26 02:46:03,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-26 02:46:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:46:03,263 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-26 02:46:03,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:46:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-26 02:46:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:46:03,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:03,265 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:46:03,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:46:03,466 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 539368314, now seen corresponding path program 1 times [2019-11-26 02:46:03,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:46:03,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [178716832] [2019-11-26 02:46:03,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:46:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:46:03,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:46:03,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:46:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:46:03,583 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:46:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:46:03,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [178716832] [2019-11-26 02:46:03,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848402832] [2019-11-26 02:46:03,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-26 02:46:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:46:03,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:46:03,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:46:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:46:03,832 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:46:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:46:03,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:46:03,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 14 [2019-11-26 02:46:03,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013868071] [2019-11-26 02:46:03,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:46:03,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:46:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:46:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:46:03,944 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 14 states. [2019-11-26 02:46:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:46:04,121 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-26 02:46:04,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-26 02:46:04,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-26 02:46:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:46:04,122 INFO L225 Difference]: With dead ends: 39 [2019-11-26 02:46:04,123 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:46:04,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:46:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:46:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-26 02:46:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:46:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-26 02:46:04,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2019-11-26 02:46:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:46:04,134 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-26 02:46:04,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:46:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-26 02:46:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-26 02:46:04,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:04,137 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:46:04,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:46:04,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash -719196619, now seen corresponding path program 2 times [2019-11-26 02:46:04,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:46:04,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1373574473] [2019-11-26 02:46:04,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:46:04,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:46:04,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:46:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:46:04,642 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:46:04,642 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:46:04,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:46:04,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:46:04 BoogieIcfgContainer [2019-11-26 02:46:04,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:46:04,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:46:04,874 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:46:04,874 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:46:04,875 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:46:02" (3/4) ... [2019-11-26 02:46:04,878 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:46:04,922 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ac517d3d-33c7-4a9f-9f1a-83524f1e924b/bin/utaipan/witness.graphml [2019-11-26 02:46:04,922 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:46:04,924 INFO L168 Benchmark]: Toolchain (without parser) took 2598.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 960.4 MB in the beginning and 982.3 MB in the end (delta: -21.8 MB). Peak memory consumption was 105.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:04,925 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:46:04,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.98 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:04,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -173.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:04,926 INFO L168 Benchmark]: Boogie Preprocessor took 13.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:46:04,927 INFO L168 Benchmark]: RCFGBuilder took 198.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:04,927 INFO L168 Benchmark]: TraceAbstraction took 2063.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 988.9 MB in the end (delta: 116.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:04,928 INFO L168 Benchmark]: Witness Printer took 48.69 ms. Allocated memory is still 1.2 GB. Free memory was 988.9 MB in the beginning and 982.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:04,931 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 195.98 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 73.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -173.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 198.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2063.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 988.9 MB in the end (delta: 116.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 11.5 GB. * Witness Printer took 48.69 ms. Allocated memory is still 1.2 GB. Free memory was 988.9 MB in the beginning and 982.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id((unsigned int)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((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 2 [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 14 SDslu, 206 SDs, 0 SdLazy, 81 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 2976 SizeOfPredicates, 5 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 8/16 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...