./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/n.c40_true-unreach-call_true-termination.i --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_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c40_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/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 a2dbe578aaa8f4d94b72aa1723f297c002a26229 ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 04:06:36,481 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:06:36,482 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:06:36,490 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:06:36,490 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:06:36,491 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:06:36,492 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:06:36,493 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:06:36,494 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:06:36,494 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:06:36,495 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:06:36,495 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:06:36,496 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:06:36,496 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:06:36,497 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:06:36,498 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:06:36,498 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:06:36,499 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:06:36,501 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:06:36,502 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:06:36,503 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:06:36,503 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:06:36,505 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:06:36,505 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:06:36,505 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:06:36,506 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:06:36,506 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:06:36,507 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:06:36,507 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:06:36,508 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:06:36,508 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:06:36,509 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:06:36,509 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:06:36,509 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:06:36,510 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:06:36,510 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:06:36,510 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 04:06:36,520 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:06:36,520 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:06:36,521 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:06:36,521 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:06:36,521 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:06:36,521 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:06:36,521 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 04:06:36,521 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:06:36,522 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 04:06:36,522 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 04:06:36,522 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:06:36,522 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:06:36,522 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:06:36,523 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:06:36,524 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:06:36,524 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:06:36,524 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:06:36,524 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:06:36,524 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:06:36,524 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:06:36,524 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:06:36,525 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:06:36,525 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:06:36,525 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 04:06:36,525 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:06:36,525 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:06:36,525 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 04:06:36,525 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_00af9209-19b2-4c00-b416-2e661292879f/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 -> a2dbe578aaa8f4d94b72aa1723f297c002a26229 [2018-11-10 04:06:36,548 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:06:36,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:06:36,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:06:36,560 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:06:36,561 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:06:36,561 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/../../sv-benchmarks/c/loops/n.c40_true-unreach-call_true-termination.i [2018-11-10 04:06:36,603 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/data/d0e858be7/af325b210dec440ea1ad2626a0bd2ffe/FLAGb7b99d6d1 [2018-11-10 04:06:36,996 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:06:36,996 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/sv-benchmarks/c/loops/n.c40_true-unreach-call_true-termination.i [2018-11-10 04:06:37,001 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/data/d0e858be7/af325b210dec440ea1ad2626a0bd2ffe/FLAGb7b99d6d1 [2018-11-10 04:06:37,009 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/data/d0e858be7/af325b210dec440ea1ad2626a0bd2ffe [2018-11-10 04:06:37,010 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:06:37,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:06:37,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:06:37,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:06:37,014 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:06:37,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ca410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37, skipping insertion in model container [2018-11-10 04:06:37,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:06:37,033 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:06:37,120 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:06:37,132 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:06:37,142 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:06:37,167 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:06:37,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37 WrapperNode [2018-11-10 04:06:37,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:06:37,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:06:37,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:06:37,169 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:06:37,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:06:37,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:06:37,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:06:37,226 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:06:37,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... [2018-11-10 04:06:37,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:06:37,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:06:37,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:06:37,343 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:06:37,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/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 [2018-11-10 04:06:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:06:37,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:06:37,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:06:37,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:06:37,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:06:37,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:06:40,834 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:06:40,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:06:40 BoogieIcfgContainer [2018-11-10 04:06:40,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:06:40,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:06:40,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:06:40,837 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:06:40,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:06:37" (1/3) ... [2018-11-10 04:06:40,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26eef146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:06:40, skipping insertion in model container [2018-11-10 04:06:40,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:06:37" (2/3) ... [2018-11-10 04:06:40,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26eef146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:06:40, skipping insertion in model container [2018-11-10 04:06:40,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:06:40" (3/3) ... [2018-11-10 04:06:40,840 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c40_true-unreach-call_true-termination.i [2018-11-10 04:06:40,847 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:06:40,857 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 04:06:40,869 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 04:06:40,896 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:06:40,896 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:06:40,896 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:06:40,896 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:06:40,897 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:06:40,900 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:06:40,900 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:06:40,900 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:06:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 04:06:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 04:06:40,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:06:40,917 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:06:40,919 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:06:40,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:06:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash -692123559, now seen corresponding path program 1 times [2018-11-10 04:06:40,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:06:40,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:06:40,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:06:40,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:06:40,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:06:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:06:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:06:41,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:06:41,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:06:41,121 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:06:41,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:06:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:06:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:06:41,137 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 04:06:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:06:41,147 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-11-10 04:06:41,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:06:41,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-10 04:06:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:06:41,153 INFO L225 Difference]: With dead ends: 29 [2018-11-10 04:06:41,153 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 04:06:41,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:06:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 04:06:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 04:06:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 04:06:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 04:06:41,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-10 04:06:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:06:41,176 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 04:06:41,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:06:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 04:06:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 04:06:41,177 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:06:41,177 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:06:41,177 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:06:41,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:06:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 925435379, now seen corresponding path program 1 times [2018-11-10 04:06:41,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:06:41,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:06:41,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:06:41,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:06:41,179 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:06:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:06:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:06:41,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:06:41,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 04:06:41,266 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:06:41,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 04:06:41,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 04:06:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:06:41,268 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2018-11-10 04:06:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:06:41,301 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-10 04:06:41,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 04:06:41,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-10 04:06:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:06:41,303 INFO L225 Difference]: With dead ends: 22 [2018-11-10 04:06:41,303 INFO L226 Difference]: Without dead ends: 17 [2018-11-10 04:06:41,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:06:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-10 04:06:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-10 04:06:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-10 04:06:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-10 04:06:41,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-11-10 04:06:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:06:41,307 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-10 04:06:41,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 04:06:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-10 04:06:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-10 04:06:41,307 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:06:41,308 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:06:41,308 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:06:41,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:06:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2086497215, now seen corresponding path program 1 times [2018-11-10 04:06:41,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:06:41,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:06:41,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:06:41,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:06:41,309 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:06:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:06:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:06:41,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:06:41,633 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:06:41,634 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-11-10 04:06:41,635 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [16], [20], [23], [26], [28], [38], [39], [40] [2018-11-10 04:06:41,678 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 04:06:41,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 04:06:50,824 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 04:06:50,825 INFO L272 AbstractInterpreter]: Visited 14 different actions 1268 times. Merged at 8 different actions 1253 times. Widened at 1 different actions 153 times. Found 1 fixpoints after 1 different actions. Largest state had 38 variables. [2018-11-10 04:06:50,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:06:50,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 04:06:50,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:06:50,841 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/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 [2018-11-10 04:06:50,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:06:50,847 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 04:06:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:06:50,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:06:50,984 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 24 treesize of output 20 [2018-11-10 04:06:50,987 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 20 treesize of output 16 [2018-11-10 04:06:50,988 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-10 04:06:51,005 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-10 04:06:51,017 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 11 treesize of output 8 [2018-11-10 04:06:51,019 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-10 04:06:51,019 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,021 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,027 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,028 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:27, output treesize:12 [2018-11-10 04:06:51,047 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 22 treesize of output 17 [2018-11-10 04:06:51,060 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 27 [2018-11-10 04:06:51,061 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-11-10 04:06:51,073 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-10 04:06:51,089 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-10 04:06:51,090 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2018-11-10 04:06:51,146 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 24 treesize of output 20 [2018-11-10 04:06:51,149 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 04:06:51,150 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2018-11-10 04:06:51,151 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,165 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,186 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:41, output treesize:4 [2018-11-10 04:06:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:06:51,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:06:51,239 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 22 treesize of output 20 [2018-11-10 04:06:51,252 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 15 treesize of output 3 [2018-11-10 04:06:51,252 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,258 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-10 04:06:51,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-10 04:06:51,268 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:28 [2018-11-10 04:06:51,298 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 9 treesize of output 7 [2018-11-10 04:06:51,299 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 7 treesize of output 3 [2018-11-10 04:06:51,300 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,301 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,302 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 04:06:51,302 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:13, output treesize:3 [2018-11-10 04:06:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:06:51,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:06:51,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 14 [2018-11-10 04:06:51,329 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 04:06:51,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:06:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:06:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:06:51,331 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 12 states. [2018-11-10 04:06:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:06:52,067 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-11-10 04:06:52,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:06:52,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-11-10 04:06:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:06:52,068 INFO L225 Difference]: With dead ends: 17 [2018-11-10 04:06:52,068 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 04:06:52,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:06:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 04:06:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 04:06:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 04:06:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 04:06:52,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-11-10 04:06:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:06:52,069 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 04:06:52,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:06:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 04:06:52,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 04:06:52,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 04:06:52,155 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:06:52,155 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:06:52,156 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:06:52,156 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:06:52,156 INFO L421 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (not (= |~#x~0.base| |~#y~0.base|)) (= ~i~0 0) (<= 0 |~#x~0.offset|) (<= |~#x~0.offset| 0) (= 0 (select (select |#memory_int| |~#x~0.base|) |~#x~0.offset|))) [2018-11-10 04:06:52,156 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:06:52,156 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:06:52,156 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 23) no Hoare annotation was computed. [2018-11-10 04:06:52,156 INFO L425 ceAbstractionStarter]: For program point L19(lines 19 20) no Hoare annotation was computed. [2018-11-10 04:06:52,156 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 23) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L421 ceAbstractionStarter]: At program point mainENTRY(lines 8 23) the Hoare annotation is: (or (< 0 |~#x~0.offset|) (not (= 0 |old(~i~0)|)) (not (= 0 (select (select |old(#memory_int)| |~#x~0.base|) |~#x~0.offset|))) (= |~#y~0.base| |~#x~0.base|) (< |~#x~0.offset| 0) (and (= ~i~0 0) (= 0 (select (select |#memory_int| |~#x~0.base|) |~#x~0.offset|)))) [2018-11-10 04:06:52,157 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L425 ceAbstractionStarter]: For program point L12-1(lines 12 15) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2018-11-10 04:06:52,157 INFO L421 ceAbstractionStarter]: At program point L12-4(lines 12 15) the Hoare annotation is: (or (< 0 |~#x~0.offset|) (not (= 0 |old(~i~0)|)) (not (= 0 (select (select |old(#memory_int)| |~#x~0.base|) |~#x~0.offset|))) (= |~#y~0.base| |~#x~0.base|) (< |~#x~0.offset| 0) (and (= ~i~0 0) (= 0 (select (select |#memory_int| |~#x~0.base|) |~#x~0.offset|)))) [2018-11-10 04:06:52,158 INFO L425 ceAbstractionStarter]: For program point L12-5(lines 12 15) no Hoare annotation was computed. [2018-11-10 04:06:52,163 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,164 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,167 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,168 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:06:52 BoogieIcfgContainer [2018-11-10 04:06:52,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:06:52,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:06:52,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:06:52,170 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:06:52,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:06:40" (3/4) ... [2018-11-10 04:06:52,174 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 04:06:52,179 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 04:06:52,179 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 04:06:52,193 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 424 nodes and edges [2018-11-10 04:06:52,195 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 212 nodes and edges [2018-11-10 04:06:52,196 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 202 nodes and edges [2018-11-10 04:06:52,196 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 04:06:52,223 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((0 < x || !(0 == \old(i))) || !(0 == \old(unknown-#memory_int-unknown)[x][x])) || y == x) || x < 0) || (i == 0 && 0 == unknown-#memory_int-unknown[x][x]) [2018-11-10 04:06:52,266 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_00af9209-19b2-4c00-b416-2e661292879f/bin-2019/utaipan/witness.graphml [2018-11-10 04:06:52,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:06:52,267 INFO L168 Benchmark]: Toolchain (without parser) took 15255.86 ms. Allocated memory was 1.0 GB in the beginning and 2.9 GB in the end (delta: 1.9 GB). Free memory was 960.2 MB in the beginning and 832.8 MB in the end (delta: 127.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 11.5 GB. [2018-11-10 04:06:52,268 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:06:52,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.47 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 946.7 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2018-11-10 04:06:52,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.62 ms. Allocated memory is still 1.0 GB. Free memory was 946.7 MB in the beginning and 941.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 04:06:52,268 INFO L168 Benchmark]: Boogie Preprocessor took 115.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 941.3 MB in the beginning and 1.2 GB in the end (delta: -220.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2018-11-10 04:06:52,269 INFO L168 Benchmark]: RCFGBuilder took 3492.09 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 159.9 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -52.0 MB). Peak memory consumption was 410.3 MB. Max. memory is 11.5 GB. [2018-11-10 04:06:52,269 INFO L168 Benchmark]: TraceAbstraction took 11334.60 ms. Allocated memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: 1.5 GB). Free memory was 1.2 GB in the beginning and 832.8 MB in the end (delta: 380.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. [2018-11-10 04:06:52,269 INFO L168 Benchmark]: Witness Printer took 96.06 ms. Allocated memory is still 2.9 GB. Free memory is still 832.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:06:52,271 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 156.47 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 946.7 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.62 ms. Allocated memory is still 1.0 GB. Free memory was 946.7 MB in the beginning and 941.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 115.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 941.3 MB in the beginning and 1.2 GB in the end (delta: -220.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 3492.09 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 159.9 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -52.0 MB). Peak memory consumption was 410.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11334.60 ms. Allocated memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: 1.5 GB). Free memory was 1.2 GB in the beginning and 832.8 MB in the end (delta: 380.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. * Witness Printer took 96.06 ms. Allocated memory is still 2.9 GB. Free memory is still 832.8 MB. There was no memory consumed. 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: 20]: 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: 12]: Loop Invariant [2018-11-10 04:06:52,274 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,274 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,275 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-10 04:06:52,275 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((0 < x || !(0 == \old(i))) || !(0 == \old(unknown-#memory_int-unknown)[x][x])) || y == x) || x < 0) || (i == 0 && 0 == unknown-#memory_int-unknown[x][x]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. SAFE Result, 11.2s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 SDtfs, 13 SDslu, 21 SDs, 0 SdLazy, 18 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 6 NumberOfFragments, 93 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 20 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 67 ConstructedInterpolants, 5 QuantifiedInterpolants, 6379 SizeOfPredicates, 29 NumberOfNonLiveVariables, 174 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/9 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...