./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 14367fbcb63815bbc35abe1c5a8e938762f99ead --rcfgbuilder.size.of.a.code.block SingleStatement ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:55:10,971 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:55:10,973 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:55:10,991 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:55:10,991 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:55:10,992 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:55:10,994 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:55:10,997 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:55:10,999 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:55:11,001 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:55:11,003 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:55:11,004 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:55:11,005 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:55:11,008 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:55:11,012 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:55:11,013 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:55:11,016 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:55:11,017 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:55:11,021 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:55:11,022 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:55:11,023 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:55:11,025 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:55:11,027 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:55:11,028 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:55:11,028 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:55:11,029 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:55:11,030 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:55:11,031 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:55:11,032 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:55:11,033 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:55:11,033 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:55:11,035 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:55:11,035 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:55:11,035 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:55:11,036 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:55:11,037 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:55:11,038 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:55:11,053 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:55:11,053 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:55:11,057 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:55:11,057 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:55:11,057 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:55:11,058 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:55:11,058 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:55:11,058 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:55:11,058 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:55:11,058 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:55:11,058 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:55:11,059 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:55:11,059 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:55:11,060 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:55:11,063 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:55:11,063 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:55:11,063 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:55:11,063 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:55:11,064 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:55:11,064 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:55:11,064 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:55:11,064 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:55:11,064 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:55:11,064 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:55:11,065 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:55:11,065 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:55:11,065 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:55:11,065 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:55:11,065 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:55:11,065 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:55:11,066 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:55:11,068 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:55:11,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:55:11,068 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:55:11,068 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> 14367fbcb63815bbc35abe1c5a8e938762f99ead Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:55:11,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:55:11,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:55:11,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:55:11,172 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:55:11,173 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:55:11,176 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i [2018-10-22 09:55:11,235 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03ef8e0e9/c7d2d6747477480db39feffe0411ad4b/FLAG1ad8fee6c [2018-10-22 09:55:11,681 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:55:11,682 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half_true-unreach-call_true-termination.i [2018-10-22 09:55:11,689 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03ef8e0e9/c7d2d6747477480db39feffe0411ad4b/FLAG1ad8fee6c [2018-10-22 09:55:11,705 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/03ef8e0e9/c7d2d6747477480db39feffe0411ad4b [2018-10-22 09:55:11,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:55:11,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:55:11,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:55:11,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:55:11,720 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:55:11,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:55:11" (1/1) ... [2018-10-22 09:55:11,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a23664d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:11, skipping insertion in model container [2018-10-22 09:55:11,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:55:11" (1/1) ... [2018-10-22 09:55:11,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:55:11,765 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:55:11,982 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:55:11,986 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:55:12,005 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:55:12,021 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:55:12,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12 WrapperNode [2018-10-22 09:55:12,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:55:12,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:55:12,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:55:12,023 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:55:12,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:55:12,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:55:12,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:55:12,043 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:55:12,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... [2018-10-22 09:55:12,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:55:12,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:55:12,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:55:12,074 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:55:12,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:12,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:55:12,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:55:12,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:55:12,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:55:12,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:55:12,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:55:12,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:55:12,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:55:12,552 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:55:12,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:12 BoogieIcfgContainer [2018-10-22 09:55:12,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:55:12,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:55:12,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:55:12,558 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:55:12,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:55:11" (1/3) ... [2018-10-22 09:55:12,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668ea725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:55:12, skipping insertion in model container [2018-10-22 09:55:12,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:12" (2/3) ... [2018-10-22 09:55:12,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668ea725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:55:12, skipping insertion in model container [2018-10-22 09:55:12,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:12" (3/3) ... [2018-10-22 09:55:12,563 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-10-22 09:55:12,572 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:55:12,580 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:55:12,597 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:55:12,629 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:55:12,630 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:55:12,630 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:55:12,630 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:55:12,630 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:55:12,630 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:55:12,631 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:55:12,631 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:55:12,632 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:55:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-10-22 09:55:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 09:55:12,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:12,659 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:12,662 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:12,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1100762754, now seen corresponding path program 1 times [2018-10-22 09:55:12,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:12,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:12,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:12,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:12,716 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:12,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:12,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:55:12,784 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:12,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:55:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:55:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:55:12,807 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-10-22 09:55:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:12,831 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-22 09:55:12,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:55:12,833 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-10-22 09:55:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:12,841 INFO L225 Difference]: With dead ends: 45 [2018-10-22 09:55:12,841 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 09:55:12,845 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 [2018-10-22 09:55:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 09:55:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-22 09:55:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 09:55:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 09:55:12,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2018-10-22 09:55:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:12,883 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 09:55:12,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:55:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 09:55:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 09:55:12,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:12,884 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:12,885 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:12,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -340663664, now seen corresponding path program 1 times [2018-10-22 09:55:12,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:12,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:12,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:12,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:12,887 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:13,385 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-10-22 09:55:13,545 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2018-10-22 09:55:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:13,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:13,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-10-22 09:55:13,655 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:13,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 09:55:13,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 09:55:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-22 09:55:13,658 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2018-10-22 09:55:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:14,022 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-10-22 09:55:14,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 09:55:14,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-22 09:55:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:14,026 INFO L225 Difference]: With dead ends: 46 [2018-10-22 09:55:14,026 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 09:55:14,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-22 09:55:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 09:55:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2018-10-22 09:55:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 09:55:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-22 09:55:14,036 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2018-10-22 09:55:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:14,036 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-22 09:55:14,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 09:55:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-22 09:55:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 09:55:14,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:14,038 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:14,038 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:14,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash -147867528, now seen corresponding path program 1 times [2018-10-22 09:55:14,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:14,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:14,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:14,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:14,041 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:14,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:14,257 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:14,258 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-10-22 09:55:14,261 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [13], [14], [18], [21], [23], [31], [33], [34], [35], [42], [45], [47], [53], [54], [55], [57] [2018-10-22 09:55:14,313 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:55:14,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:55:14,473 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:55:14,474 INFO L272 AbstractInterpreter]: Visited 19 different actions 19 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-10-22 09:55:14,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:14,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:55:14,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:14,508 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:14,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:14,518 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:14,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:14,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:15,833 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-22 09:55:15,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 10] total 17 [2018-10-22 09:55:15,834 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:15,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:55:15,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:55:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2018-10-22 09:55:15,836 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2018-10-22 09:55:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:15,957 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2018-10-22 09:55:15,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 09:55:15,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-10-22 09:55:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:15,959 INFO L225 Difference]: With dead ends: 44 [2018-10-22 09:55:15,959 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 09:55:15,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2018-10-22 09:55:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 09:55:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-10-22 09:55:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 09:55:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-22 09:55:15,967 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-10-22 09:55:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:15,967 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-22 09:55:15,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:55:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-22 09:55:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 09:55:15,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:15,969 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:15,969 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:15,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1931126441, now seen corresponding path program 1 times [2018-10-22 09:55:15,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:15,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:15,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:15,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:15,971 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:16,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:16,299 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:16,300 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-10-22 09:55:16,300 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [13], [14], [18], [21], [23], [26], [27], [28], [29], [33], [34], [35], [42], [45], [47], [53], [54], [55], [57] [2018-10-22 09:55:16,303 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:55:16,303 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:55:16,344 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:55:16,408 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:55:16,408 INFO L272 AbstractInterpreter]: Visited 25 different actions 33 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-22 09:55:16,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:16,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:55:16,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:16,429 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:16,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:16,438 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:16,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:16,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:16,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:16,862 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:16,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:16,882 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:16,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:16,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:17,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:17,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6, 6, 6] total 21 [2018-10-22 09:55:17,017 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:17,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 09:55:17,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 09:55:17,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-10-22 09:55:17,019 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2018-10-22 09:55:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:17,433 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-10-22 09:55:17,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 09:55:17,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-10-22 09:55:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:17,435 INFO L225 Difference]: With dead ends: 49 [2018-10-22 09:55:17,435 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 09:55:17,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2018-10-22 09:55:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 09:55:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-10-22 09:55:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 09:55:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-22 09:55:17,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2018-10-22 09:55:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:17,442 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-22 09:55:17,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 09:55:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-22 09:55:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 09:55:17,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:17,444 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:17,444 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:17,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash -462766593, now seen corresponding path program 1 times [2018-10-22 09:55:17,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:17,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:17,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:17,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:17,446 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:17,742 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-22 09:55:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:17,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:17,939 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:17,939 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-10-22 09:55:17,940 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [13], [14], [18], [21], [23], [26], [27], [28], [29], [31], [33], [34], [35], [42], [45], [47], [53], [54], [55], [57] [2018-10-22 09:55:17,943 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:55:17,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:55:17,966 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:55:18,880 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:55:18,881 INFO L272 AbstractInterpreter]: Visited 26 different actions 548 times. Merged at 11 different actions 367 times. Widened at 1 different actions 27 times. Found 32 fixpoints after 4 different actions. Largest state had 6 variables. [2018-10-22 09:55:18,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:18,920 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:55:18,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:18,920 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:55:18,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:18,936 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:18,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:19,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:20,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:20,557 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:20,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:20,575 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:20,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:20,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:21,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:21,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15, 14, 15] total 41 [2018-10-22 09:55:21,197 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:21,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 09:55:21,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 09:55:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1423, Unknown=1, NotChecked=0, Total=1640 [2018-10-22 09:55:21,199 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 23 states. [2018-10-22 09:55:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:22,154 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2018-10-22 09:55:22,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 09:55:22,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-10-22 09:55:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:22,158 INFO L225 Difference]: With dead ends: 73 [2018-10-22 09:55:22,158 INFO L226 Difference]: Without dead ends: 55 [2018-10-22 09:55:22,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=471, Invalid=2498, Unknown=1, NotChecked=0, Total=2970 [2018-10-22 09:55:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-22 09:55:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2018-10-22 09:55:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 09:55:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-22 09:55:22,179 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2018-10-22 09:55:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:22,180 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-22 09:55:22,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 09:55:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-22 09:55:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 09:55:22,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:22,181 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:22,182 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:22,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:22,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1563759928, now seen corresponding path program 2 times [2018-10-22 09:55:22,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:22,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:22,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:22,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:22,186 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 09:55:22,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:22,553 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:22,553 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:22,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:22,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:22,554 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:55:22,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:22,565 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:22,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:22,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:22,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:23,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:29,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:29,343 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:29,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:29,374 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:29,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:29,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:29,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:29,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:29,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:29,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 10, 10, 10] total 39 [2018-10-22 09:55:29,604 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:29,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 09:55:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 09:55:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1320, Unknown=8, NotChecked=0, Total=1482 [2018-10-22 09:55:29,607 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 26 states. [2018-10-22 09:55:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:31,037 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2018-10-22 09:55:31,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 09:55:31,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 41 [2018-10-22 09:55:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:31,039 INFO L225 Difference]: With dead ends: 80 [2018-10-22 09:55:31,039 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 09:55:31,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=477, Invalid=3547, Unknown=8, NotChecked=0, Total=4032 [2018-10-22 09:55:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 09:55:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2018-10-22 09:55:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 09:55:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-22 09:55:31,048 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 41 [2018-10-22 09:55:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:31,048 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-22 09:55:31,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 09:55:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-22 09:55:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 09:55:31,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:31,050 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:31,050 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:31,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash -71321936, now seen corresponding path program 3 times [2018-10-22 09:55:31,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:31,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:31,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:31,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:31,052 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-22 09:55:31,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:31,541 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:31,541 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:31,541 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:31,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:31,542 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:55:31,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:55:31,550 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:55:31,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 09:55:31,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:31,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:32,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:38,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:38,339 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:38,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:55:38,355 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:55:38,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 09:55:38,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:38,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:38,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:41,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:41,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 21, 20, 21] total 63 [2018-10-22 09:55:41,408 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:41,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 09:55:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 09:55:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3476, Unknown=19, NotChecked=0, Total=3906 [2018-10-22 09:55:41,411 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 33 states. [2018-10-22 09:55:43,102 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-22 09:55:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:43,219 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-22 09:55:43,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 09:55:43,220 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2018-10-22 09:55:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:43,222 INFO L225 Difference]: With dead ends: 67 [2018-10-22 09:55:43,222 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:55:43,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1113, Invalid=7058, Unknown=19, NotChecked=0, Total=8190 [2018-10-22 09:55:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:55:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:55:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:55:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:55:43,226 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2018-10-22 09:55:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:43,226 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:55:43,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 09:55:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:55:43,226 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:55:43,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:55:43,401 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:55:43,401 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:55:43,401 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:55:43,401 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:55:43,401 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:55:43,401 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L17-1(line 17) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L17-2(line 17) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-10-22 09:55:43,402 INFO L425 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2018-10-22 09:55:43,403 INFO L425 ceAbstractionStarter]: For program point L15-4(lines 15 19) no Hoare annotation was computed. [2018-10-22 09:55:43,403 INFO L425 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2018-10-22 09:55:43,403 INFO L425 ceAbstractionStarter]: For program point L15-6(line 15) no Hoare annotation was computed. [2018-10-22 09:55:43,403 INFO L421 ceAbstractionStarter]: At program point L15-7(lines 15 19) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (<= main_~n~0 main_~k~0))) (or (let ((.cse0 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (and (<= main_~i~0 .cse1) (<= .cse1 main_~i~0) .cse2) (and (= main_~n~0 0) (= main_~i~0 0)))) [2018-10-22 09:55:43,403 INFO L421 ceAbstractionStarter]: At program point L15-8(lines 15 19) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and .cse0 (<= main_~n~0 main_~k~0)) (and (<= 0 main_~n~0) (<= main_~n~0 0) .cse0))) [2018-10-22 09:55:43,403 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-10-22 09:55:43,403 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-10-22 09:55:43,403 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 09:55:43,404 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:55:43,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:55:43 BoogieIcfgContainer [2018-10-22 09:55:43,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:55:43,419 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:55:43,419 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:55:43,419 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:55:43,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:12" (3/4) ... [2018-10-22 09:55:43,425 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:55:43,432 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:55:43,433 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:55:43,433 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:55:43,439 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-22 09:55:43,440 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-22 09:55:43,440 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:55:43,493 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:55:43,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:55:43,494 INFO L168 Benchmark]: Toolchain (without parser) took 31782.43 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 329.3 MB). Free memory was 953.2 MB in the beginning and 1.3 GB in the end (delta: -369.6 MB). Peak memory consumption was 433.6 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:43,496 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:55:43,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.95 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:43,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.63 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:55:43,498 INFO L168 Benchmark]: Boogie Preprocessor took 29.43 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:55:43,498 INFO L168 Benchmark]: RCFGBuilder took 481.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -167.1 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:43,499 INFO L168 Benchmark]: TraceAbstraction took 30864.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 175.6 MB). Free memory was 1.1 GB in the beginning and 827.8 MB in the end (delta: 281.7 MB). Peak memory consumption was 457.4 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:43,501 INFO L168 Benchmark]: Witness Printer took 74.40 ms. Allocated memory was 1.3 GB in the beginning and 1.4 GB in the end (delta: 21.0 MB). Free memory was 827.8 MB in the beginning and 1.3 GB in the end (delta: -494.9 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2018-10-22 09:55:43,506 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 307.95 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 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 19.63 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.43 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 481.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -167.1 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 30864.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 175.6 MB). Free memory was 1.1 GB in the beginning and 827.8 MB in the end (delta: 281.7 MB). Peak memory consumption was 457.4 MB. Max. memory is 11.5 GB. * Witness Printer took 74.40 ms. Allocated memory was 1.3 GB in the beginning and 1.4 GB in the end (delta: 21.0 MB). Free memory was 827.8 MB in the beginning and 1.3 GB in the end (delta: -494.9 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 15]: Loop Invariant Derived loop invariant: (((i + 1 <= 2 * n && 2 * n <= i + 1) && n <= k) || ((i <= 2 * n && 2 * n <= i) && n <= k)) || (n == 0 && i == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. SAFE Result, 30.7s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 5.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 200 SDslu, 1109 SDs, 0 SdLazy, 1337 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 775 GetRequests, 499 SyntacticMatches, 22 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 25.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 48 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 28 NumberOfFragments, 63 HoareAnnotationTreeSize, 16 FomulaSimplifications, 42 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 232 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 23.1s InterpolantComputationTime, 517 NumberOfCodeBlocks, 517 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 807 ConstructedInterpolants, 75 QuantifiedInterpolants, 265026 SizeOfPredicates, 91 NumberOfNonLiveVariables, 546 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 9/436 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...