./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/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 c0477f4e5b27a6da26de88eabc674e3fb9f5fd06 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:55:31,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:55:31,307 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:55:31,316 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:55:31,316 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:55:31,317 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:55:31,318 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:55:31,319 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:55:31,320 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:55:31,321 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:55:31,321 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:55:31,322 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:55:31,322 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:55:31,323 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:55:31,323 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:55:31,324 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:55:31,324 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:55:31,327 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:55:31,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:55:31,329 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:55:31,330 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:55:31,331 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:55:31,332 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:55:31,333 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:55:31,333 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:55:31,334 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:55:31,335 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:55:31,335 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:55:31,336 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:55:31,336 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:55:31,337 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:55:31,337 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 22:55:31,337 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 22:55:31,337 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 22:55:31,338 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 22:55:31,339 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 22:55:31,339 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 22:55:31,349 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:55:31,349 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:55:31,350 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:55:31,350 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 22:55:31,350 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 22:55:31,350 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 22:55:31,350 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 22:55:31,350 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 22:55:31,351 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 22:55:31,351 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 22:55:31,351 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 22:55:31,351 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:55:31,351 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 22:55:31,352 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:55:31,353 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:55:31,353 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:55:31,353 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:55:31,353 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:55:31,353 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:55:31,353 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:55:31,356 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:55:31,356 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:55:31,356 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:55:31,356 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 22:55:31,356 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:55:31,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:55:31,356 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:55:31,356 INFO L133 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/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/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 -> c0477f4e5b27a6da26de88eabc674e3fb9f5fd06 [2018-10-26 22:55:31,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:55:31,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:55:31,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:55:31,396 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:55:31,396 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:55:31,397 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c [2018-10-26 22:55:31,442 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/data/ed830aadc/a1d7c654cde8493c939e4de842d60ab4/FLAG982e435e3 [2018-10-26 22:55:31,815 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:55:31,815 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c [2018-10-26 22:55:31,820 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/data/ed830aadc/a1d7c654cde8493c939e4de842d60ab4/FLAG982e435e3 [2018-10-26 22:55:31,831 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/data/ed830aadc/a1d7c654cde8493c939e4de842d60ab4 [2018-10-26 22:55:31,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:55:31,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 22:55:31,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:55:31,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:55:31,839 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:55:31,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:55:31" (1/1) ... [2018-10-26 22:55:31,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9a755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:31, skipping insertion in model container [2018-10-26 22:55:31,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:55:31" (1/1) ... [2018-10-26 22:55:31,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:55:31,866 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:55:31,981 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:55:31,983 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:55:31,999 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:55:32,015 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:55:32,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32 WrapperNode [2018-10-26 22:55:32,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:55:32,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:55:32,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:55:32,017 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:55:32,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:55:32,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:55:32,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:55:32,044 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:55:32,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... [2018-10-26 22:55:32,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:55:32,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:55:32,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:55:32,061 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:55:32,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/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 [2018-10-26 22:55:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 22:55:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 22:55:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:55:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:55:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 22:55:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 22:55:32,524 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:55:32,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:55:32 BoogieIcfgContainer [2018-10-26 22:55:32,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:55:32,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:55:32,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:55:32,529 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:55:32,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:55:31" (1/3) ... [2018-10-26 22:55:32,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf1f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:55:32, skipping insertion in model container [2018-10-26 22:55:32,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:55:32" (2/3) ... [2018-10-26 22:55:32,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf1f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:55:32, skipping insertion in model container [2018-10-26 22:55:32,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:55:32" (3/3) ... [2018-10-26 22:55:32,532 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel_true-unreach-call.i.v+cfa-reducer.c [2018-10-26 22:55:32,542 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:55:32,552 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:55:32,576 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:55:32,611 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:55:32,612 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:55:32,612 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:55:32,612 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:55:32,612 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:55:32,612 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:55:32,612 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:55:32,612 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:55:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-10-26 22:55:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 22:55:32,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:55:32,636 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:55:32,637 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:55:32,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:55:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash -920288751, now seen corresponding path program 1 times [2018-10-26 22:55:32,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:55:32,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:32,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:55:32,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:32,686 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:55:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:55:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:32,876 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:55:32,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:55:32,876 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:55:32,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:55:32,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:55:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:55:32,888 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2018-10-26 22:55:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:55:33,012 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-10-26 22:55:33,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:55:33,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-10-26 22:55:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:55:33,020 INFO L225 Difference]: With dead ends: 30 [2018-10-26 22:55:33,020 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 22:55:33,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:55:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 22:55:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-26 22:55:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 22:55:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 22:55:33,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-26 22:55:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:55:33,053 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 22:55:33,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:55:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 22:55:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 22:55:33,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:55:33,054 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:55:33,054 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:55:33,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:55:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash 363684724, now seen corresponding path program 1 times [2018-10-26 22:55:33,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:55:33,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:33,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:55:33,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:33,056 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:55:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:55:33,330 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-10-26 22:55:33,491 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2018-10-26 22:55:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:33,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:55:33,568 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:55:33,568 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-10-26 22:55:33,570 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [8], [11], [13], [16], [18], [21], [22], [28], [29], [30] [2018-10-26 22:55:33,602 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:55:33,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:55:36,598 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 22:55:36,599 INFO L272 AbstractInterpreter]: Visited 13 different actions 282 times. Merged at 5 different actions 268 times. Widened at 1 different actions 50 times. Found 1 fixpoints after 1 different actions. Largest state had 38 variables. [2018-10-26 22:55:36,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:55:36,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 22:55:36,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:55:36,612 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:55:36,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:55:36,621 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 22:55:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:55:36,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:55:36,786 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-26 22:55:36,788 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-26 22:55:36,789 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 22:55:36,802 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:36,850 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:36,850 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-26 22:55:36,894 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-10-26 22:55:36,917 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2018-10-26 22:55:36,918 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-26 22:55:36,922 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-26 22:55:36,991 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-10-26 22:55:36,991 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:30 [2018-10-26 22:55:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:37,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:55:37,364 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2018-10-26 22:55:37,375 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2018-10-26 22:55:37,375 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 22:55:37,377 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:37,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:37,393 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:26, output treesize:9 [2018-10-26 22:55:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:37,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:55:37,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2018-10-26 22:55:37,443 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:55:37,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:55:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:55:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:55:37,445 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2018-10-26 22:55:37,760 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2018-10-26 22:55:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:55:37,817 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-26 22:55:37,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:55:37,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-10-26 22:55:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:55:37,818 INFO L225 Difference]: With dead ends: 20 [2018-10-26 22:55:37,818 INFO L226 Difference]: Without dead ends: 17 [2018-10-26 22:55:37,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:55:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-26 22:55:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-26 22:55:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 22:55:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-26 22:55:37,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-26 22:55:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:55:37,823 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-26 22:55:37,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:55:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-26 22:55:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:55:37,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:55:37,824 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:55:37,824 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:55:37,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:55:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1606580247, now seen corresponding path program 2 times [2018-10-26 22:55:37,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:55:37,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:37,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:55:37,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:37,826 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:55:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:55:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:38,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:55:38,265 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:55:38,265 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 22:55:38,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 22:55:38,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:55:38,265 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:55:38,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:55:38,284 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 22:55:38,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 22:55:38,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:55:38,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:55:38,312 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-26 22:55:38,313 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-26 22:55:38,313 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 22:55:38,315 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:38,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:38,319 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-26 22:55:38,360 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2018-10-26 22:55:38,377 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 41 [2018-10-26 22:55:38,378 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2018-10-26 22:55:38,389 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-26 22:55:38,434 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-10-26 22:55:38,435 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:58 [2018-10-26 22:55:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:38,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:55:38,694 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2018-10-26 22:55:38,742 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2018-10-26 22:55:38,743 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 22:55:38,746 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:38,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:38,753 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:12 [2018-10-26 22:55:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:38,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:55:38,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2018-10-26 22:55:38,867 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:55:38,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:55:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:55:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:55:38,868 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-26 22:55:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:55:39,285 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-26 22:55:39,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:55:39,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-26 22:55:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:55:39,286 INFO L225 Difference]: With dead ends: 25 [2018-10-26 22:55:39,286 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 22:55:39,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:55:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 22:55:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 22:55:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 22:55:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-26 22:55:39,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2018-10-26 22:55:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:55:39,290 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-26 22:55:39,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:55:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-26 22:55:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:55:39,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:55:39,291 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:55:39,291 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:55:39,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:55:39,291 INFO L82 PathProgramCache]: Analyzing trace with hash -750191843, now seen corresponding path program 3 times [2018-10-26 22:55:39,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:55:39,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:39,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:55:39,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:55:39,293 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:55:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:55:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:39,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:55:39,673 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:55:39,673 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 22:55:39,673 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 22:55:39,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:55:39,673 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 22:55:39,692 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:55:39,692 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:55:39,713 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:55:39,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:55:39,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:55:39,731 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-26 22:55:39,733 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-26 22:55:39,733 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 22:55:39,735 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:39,742 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:39,742 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-26 22:55:41,043 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2018-10-26 22:55:41,116 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 45 treesize of output 145 [2018-10-26 22:55:41,117 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-10-26 22:55:41,152 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 72 xjuncts. [2018-10-26 22:55:41,395 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-26 22:55:41,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2018-10-26 22:55:41,445 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:71, output treesize:417 [2018-10-26 22:55:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:41,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:55:44,042 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2018-10-26 22:55:44,156 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 97 [2018-10-26 22:55:44,157 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-26 22:55:44,169 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 22:55:44,175 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:44,207 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 22:55:44,207 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:87, output treesize:18 [2018-10-26 22:55:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:55:44,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:55:44,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2018-10-26 22:55:44,232 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:55:44,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:55:44,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:55:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=968, Unknown=5, NotChecked=0, Total=1190 [2018-10-26 22:55:44,233 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 25 states. [2018-10-26 22:55:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:55:44,889 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-10-26 22:55:44,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:55:44,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 20 [2018-10-26 22:55:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:55:44,890 INFO L225 Difference]: With dead ends: 24 [2018-10-26 22:55:44,890 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:55:44,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=533, Invalid=1814, Unknown=5, NotChecked=0, Total=2352 [2018-10-26 22:55:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:55:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:55:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:55:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:55:44,892 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-10-26 22:55:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:55:44,892 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:55:44,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:55:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:55:44,892 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:55:44,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:55:44,963 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:55:44,964 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-26 22:55:44,964 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:55:44,964 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:55:44,964 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 22:55:44,964 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 22:55:44,964 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:55:44,964 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 42) no Hoare annotation was computed. [2018-10-26 22:55:44,964 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 7 55) the Hoare annotation is: true [2018-10-26 22:55:44,964 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 7 55) no Hoare annotation was computed. [2018-10-26 22:55:44,964 INFO L421 ceAbstractionStarter]: At program point L24(lines 17 45) the Hoare annotation is: (let ((.cse1 (+ |main_~#main__a~0.offset| (* 4 main_~main__pos~0))) (.cse2 (= |main_~#main__a~0.offset| 0)) (.cse0 (select |#memory_int| |main_~#main__a~0.base|))) (or (and (= main_~main__marker~0 (select .cse0 .cse1)) .cse2 (= 0 main_~main__i~0) (<= 0 main_~main__pos~0)) (and (<= main_~main__i~0 main_~main__pos~0) (<= 1 .cse1) .cse2 (= main_~main__marker~0 (select .cse0 (- (+ (- |main_~#main__a~0.offset|) (* (- 4) main_~main__pos~0)))))))) [2018-10-26 22:55:44,965 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 44) no Hoare annotation was computed. [2018-10-26 22:55:44,965 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 49) no Hoare annotation was computed. [2018-10-26 22:55:44,965 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 54) no Hoare annotation was computed. [2018-10-26 22:55:44,965 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 7 55) no Hoare annotation was computed. [2018-10-26 22:55:44,965 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2018-10-26 22:55:44,965 INFO L425 ceAbstractionStarter]: For program point L35(line 35) no Hoare annotation was computed. [2018-10-26 22:55:44,974 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:44,975 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:44,980 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:44,980 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:44,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:55:44 BoogieIcfgContainer [2018-10-26 22:55:44,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:55:44,982 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 22:55:44,982 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 22:55:44,983 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 22:55:44,984 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:55:32" (3/4) ... [2018-10-26 22:55:44,988 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 22:55:44,992 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 22:55:44,993 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 22:55:44,996 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2018-10-26 22:55:44,996 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-10-26 22:55:44,996 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 22:55:45,029 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_32a25226-4d66-4780-9b5e-87643abbeb73/bin-2019/utaipan/witness.graphml [2018-10-26 22:55:45,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 22:55:45,030 INFO L168 Benchmark]: Toolchain (without parser) took 13195.50 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 745.5 MB). Free memory was 960.2 MB in the beginning and 1.0 GB in the end (delta: -40.3 MB). Peak memory consumption was 705.3 MB. Max. memory is 11.5 GB. [2018-10-26 22:55:45,030 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:55:45,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.41 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:55:45,031 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.98 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:55:45,033 INFO L168 Benchmark]: Boogie Preprocessor took 16.94 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:55:45,034 INFO L168 Benchmark]: RCFGBuilder took 463.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2018-10-26 22:55:45,034 INFO L168 Benchmark]: TraceAbstraction took 12456.77 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 594.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 112.4 MB). Peak memory consumption was 706.4 MB. Max. memory is 11.5 GB. [2018-10-26 22:55:45,034 INFO L168 Benchmark]: Witness Printer took 46.81 ms. Allocated memory is still 1.8 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2018-10-26 22:55:45,037 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 180.41 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 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 26.98 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.94 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 463.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12456.77 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 594.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 112.4 MB). Peak memory consumption was 706.4 MB. Max. memory is 11.5 GB. * Witness Printer took 46.81 ms. Allocated memory is still 1.8 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant [2018-10-26 22:55:45,046 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:45,046 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:45,047 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 22:55:45,047 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((main__marker == unknown-#memory_int-unknown[main__a][main__a + 4 * main__pos] && main__a == 0) && 0 == main__i) && 0 <= main__pos) || (((main__i <= main__pos && 1 <= main__a + 4 * main__pos) && main__a == 0) && main__marker == unknown-#memory_int-unknown[main__a][-(-main__a + -4 * main__pos)]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. SAFE Result, 12.3s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 115 SDslu, 142 SDs, 0 SdLazy, 226 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.0s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 10 NumberOfFragments, 53 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 241 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 152 ConstructedInterpolants, 11 QuantifiedInterpolants, 28936 SizeOfPredicates, 66 NumberOfNonLiveVariables, 388 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/84 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...