./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i --full-output --rcfgbuilder.size.of.a.code.block LoopFreeBlock --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-lit/afnp2014_true-unreach-call_true-termination.c.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 d51c6cc706e0ce829ba547908cd819c55d1b3081 --rcfgbuilder.size.of.a.code.block LoopFreeBlock ................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 10:18:10,052 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:18:10,054 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:18:10,066 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:18:10,067 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:18:10,068 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:18:10,069 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:18:10,071 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:18:10,072 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:18:10,073 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:18:10,074 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:18:10,074 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:18:10,075 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:18:10,076 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:18:10,077 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:18:10,078 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:18:10,079 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:18:10,081 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:18:10,083 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:18:10,085 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:18:10,086 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:18:10,087 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:18:10,090 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:18:10,090 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:18:10,090 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:18:10,091 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:18:10,092 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:18:10,093 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:18:10,094 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:18:10,095 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:18:10,096 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:18:10,096 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:18:10,097 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:18:10,097 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:18:10,100 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:18:10,101 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:18:10,101 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:18:10,123 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:18:10,123 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:18:10,124 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:18:10,124 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:18:10,124 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:18:10,124 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:18:10,125 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:18:10,125 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:18:10,125 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:18:10,125 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:18:10,126 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:18:10,126 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:18:10,127 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:18:10,127 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:18:10,127 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:18:10,127 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:18:10,127 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:18:10,128 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:18:10,128 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:18:10,128 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:18:10,128 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:18:10,129 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:18:10,129 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:18:10,129 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:18:10,129 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:18:10,129 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:18:10,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:18:10,130 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:18:10,130 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:18:10,130 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:18:10,131 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:18:10,131 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:18:10,131 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:18:10,131 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:18:10,131 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 -> d51c6cc706e0ce829ba547908cd819c55d1b3081 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:18:10,184 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:18:10,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:18:10,200 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:18:10,201 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:18:10,202 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:18:10,202 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-22 10:18:10,260 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1184e7bdd/0e765c7420ea4de58d18766719366ccc/FLAG190c2f86e [2018-10-22 10:18:10,707 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:18:10,708 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-22 10:18:10,715 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1184e7bdd/0e765c7420ea4de58d18766719366ccc/FLAG190c2f86e [2018-10-22 10:18:10,741 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1184e7bdd/0e765c7420ea4de58d18766719366ccc [2018-10-22 10:18:10,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:18:10,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:18:10,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:18:10,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:18:10,757 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:18:10,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:10" (1/1) ... [2018-10-22 10:18:10,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54fe03a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:10, skipping insertion in model container [2018-10-22 10:18:10,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:10" (1/1) ... [2018-10-22 10:18:10,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:18:10,804 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:18:11,002 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:18:11,006 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:18:11,023 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:18:11,038 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:18:11,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11 WrapperNode [2018-10-22 10:18:11,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:18:11,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:18:11,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:18:11,040 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:18:11,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:18:11,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:18:11,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:18:11,063 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:18:11,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (1/1) ... [2018-10-22 10:18:11,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:18:11,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:18:11,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:18:11,086 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:18:11,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (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 10:18:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:18:11,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:18:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:18:11,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:18:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:18:11,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:18:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:18:11,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:18:11,631 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:18:11,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:11 BoogieIcfgContainer [2018-10-22 10:18:11,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:18:11,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:18:11,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:18:11,637 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:18:11,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:18:10" (1/3) ... [2018-10-22 10:18:11,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a1a9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:18:11, skipping insertion in model container [2018-10-22 10:18:11,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:11" (2/3) ... [2018-10-22 10:18:11,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a1a9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:18:11, skipping insertion in model container [2018-10-22 10:18:11,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:11" (3/3) ... [2018-10-22 10:18:11,642 INFO L112 eAbstractionObserver]: Analyzing ICFG afnp2014_true-unreach-call_true-termination.c.i [2018-10-22 10:18:11,652 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:18:11,661 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:18:11,679 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:18:11,713 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:18:11,714 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:18:11,714 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:18:11,714 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:18:11,714 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:18:11,715 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:18:11,715 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:18:11,715 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:18:11,715 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:18:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 10:18:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 10:18:11,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:11,741 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:11,743 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:11,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2008095039, now seen corresponding path program 1 times [2018-10-22 10:18:11,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:11,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:11,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:11,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:11,798 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:11,849 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 10:18:11,851 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:11,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:18:11,852 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:11,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:18:11,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:18:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:18:11,876 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 10:18:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:11,899 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 10:18:11,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:18:11,901 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 10:18:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:11,910 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:18:11,910 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 10:18:11,914 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 10:18:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 10:18:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 10:18:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 10:18:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 10:18:11,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 10:18:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:11,951 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 10:18:11,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:18:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 10:18:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:18:11,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:11,952 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:11,952 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:11,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1427395841, now seen corresponding path program 1 times [2018-10-22 10:18:11,953 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:11,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:11,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:11,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:11,955 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:12,254 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 10:18:12,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:12,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 10:18:12,255 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:12,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 10:18:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 10:18:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 10:18:12,258 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-10-22 10:18:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:12,359 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 10:18:12,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:18:12,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 10:18:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:12,361 INFO L225 Difference]: With dead ends: 19 [2018-10-22 10:18:12,361 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 10:18:12,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 10:18:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 10:18:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 10:18:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 10:18:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 10:18:12,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 10:18:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:12,368 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 10:18:12,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 10:18:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 10:18:12,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:18:12,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:12,369 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:12,370 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:12,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash 277359332, now seen corresponding path program 1 times [2018-10-22 10:18:12,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:12,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:12,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:12,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:12,374 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:12,508 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 10:18:12,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:12,509 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:12,512 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 10:18:12,515 INFO L202 CegarAbsIntRunner]: [0], [4], [19], [21], [28], [31], [33], [39], [40], [41], [43], [48] [2018-10-22 10:18:12,561 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:18:12,562 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:18:13,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:18:13,022 INFO L272 AbstractInterpreter]: Visited 12 different actions 86 times. Merged at 3 different actions 33 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-22 10:18:13,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:13,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:18:13,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:13,043 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 10:18:13,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:13,052 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:18:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:13,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:13,164 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 10:18:13,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:13,341 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 10:18:13,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:13,375 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:13,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:13,405 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:18:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:13,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:13,519 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 10:18:13,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:13,581 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 10:18:13,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:13,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 8 [2018-10-22 10:18:13,583 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:13,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 10:18:13,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 10:18:13,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:18:13,585 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-22 10:18:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:13,702 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 10:18:13,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 10:18:13,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-22 10:18:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:13,705 INFO L225 Difference]: With dead ends: 21 [2018-10-22 10:18:13,706 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 10:18:13,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:18:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 10:18:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 10:18:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 10:18:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 10:18:13,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 10:18:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:13,712 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 10:18:13,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 10:18:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 10:18:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 10:18:13,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:13,714 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:13,714 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:13,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2130426487, now seen corresponding path program 2 times [2018-10-22 10:18:13,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:13,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:13,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:13,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:13,717 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:13,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:13,839 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:13,839 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:18:13,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:18:13,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:13,839 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:18:13,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:18:13,850 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:18:13,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:18:13,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:13,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:14,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:14,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:14,207 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 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:14,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:18:14,222 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:18:14,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:18:14,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:14,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:14,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:14,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:14,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 10 [2018-10-22 10:18:14,320 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:14,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 10:18:14,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 10:18:14,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:18:14,322 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2018-10-22 10:18:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:14,385 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-22 10:18:14,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:18:14,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-22 10:18:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:14,386 INFO L225 Difference]: With dead ends: 16 [2018-10-22 10:18:14,387 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:18:14,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-22 10:18:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:18:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:18:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:18:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:18:14,389 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-10-22 10:18:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:14,389 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:18:14,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 10:18:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:18:14,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:18:14,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:18:14,571 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 10:18:14,571 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:18:14,571 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:18:14,571 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:18:14,572 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:18:14,572 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:18:14,572 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2018-10-22 10:18:14,572 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2018-10-22 10:18:14,572 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-22 10:18:14,572 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2018-10-22 10:18:14,572 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 16) no Hoare annotation was computed. [2018-10-22 10:18:14,572 INFO L425 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2018-10-22 10:18:14,573 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 16) no Hoare annotation was computed. [2018-10-22 10:18:14,573 INFO L421 ceAbstractionStarter]: At program point L13-6(lines 13 16) the Hoare annotation is: (and (<= main_~y~0 main_~x~0) (<= 0 main_~y~0) (<= 1 main_~x~0)) [2018-10-22 10:18:14,573 INFO L421 ceAbstractionStarter]: At program point L13-7(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2018-10-22 10:18:14,573 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 10:18:14,573 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 10:18:14,573 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:18:14,579 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 10:18:14,579 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 10:18:14,579 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:18:14,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:18:14 BoogieIcfgContainer [2018-10-22 10:18:14,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:18:14,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:18:14,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:18:14,597 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:18:14,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:11" (3/4) ... [2018-10-22 10:18:14,601 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:18:14,608 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:18:14,609 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:18:14,609 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:18:14,624 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-22 10:18:14,625 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-22 10:18:14,625 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-22 10:18:14,685 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:18:14,685 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:18:14,686 INFO L168 Benchmark]: Toolchain (without parser) took 3939.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 954.5 MB in the beginning and 991.4 MB in the end (delta: -36.9 MB). Peak memory consumption was 116.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:14,688 INFO L168 Benchmark]: CDTParser took 0.18 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 10:18:14,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.27 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:14,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.81 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:14,690 INFO L168 Benchmark]: Boogie Preprocessor took 21.97 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:14,690 INFO L168 Benchmark]: RCFGBuilder took 546.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 943.8 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:14,691 INFO L168 Benchmark]: TraceAbstraction took 2962.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 991.4 MB in the end (delta: 137.5 MB). Peak memory consumption was 137.5 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:14,691 INFO L168 Benchmark]: Witness Printer took 88.78 ms. Allocated memory is still 1.2 GB. Free memory is still 991.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:14,695 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 290.27 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 943.8 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 22.81 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.97 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 546.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 943.8 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2962.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 991.4 MB in the end (delta: 137.5 MB). Peak memory consumption was 137.5 MB. Max. memory is 11.5 GB. * Witness Printer took 88.78 ms. Allocated memory is still 1.2 GB. Free memory is still 991.4 MB. There was no memory consumed. 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: 13]: Loop Invariant Derived loop invariant: (y <= x && 0 <= y) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 2.8s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 6 SDslu, 84 SDs, 0 SdLazy, 41 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 18 HoareAnnotationTreeSize, 10 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 4637 SizeOfPredicates, 12 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...