./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i --full-output --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 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-21 12:37:49,337 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:37:49,339 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:37:49,352 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:37:49,352 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:37:49,353 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:37:49,354 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:37:49,363 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:37:49,365 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:37:49,366 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:37:49,367 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:37:49,367 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:37:49,368 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:37:49,369 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:37:49,370 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:37:49,371 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:37:49,372 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:37:49,373 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:37:49,375 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:37:49,377 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:37:49,378 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:37:49,379 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:37:49,382 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:37:49,382 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:37:49,382 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:37:49,383 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:37:49,384 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:37:49,385 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:37:49,385 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:37:49,386 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:37:49,387 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:37:49,387 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:37:49,388 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:37:49,388 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:37:49,389 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:37:49,389 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:37:49,390 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:37:49,409 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:37:49,409 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:37:49,410 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:37:49,410 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:37:49,410 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:37:49,411 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:37:49,411 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:37:49,411 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:37:49,411 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:37:49,411 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:37:49,411 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:37:49,412 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:37:49,412 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:37:49,412 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:37:49,413 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:37:49,413 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:37:49,413 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:37:49,413 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:37:49,413 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:37:49,413 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:37:49,414 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:37:49,414 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:37:49,414 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:37:49,414 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:37:49,414 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:37:49,414 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:37:49,415 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:37:49,415 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:37:49,415 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:37:49,415 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:37:49,415 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:37:49,416 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:37:49,416 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:37:49,416 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:37:49,416 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 [2018-10-21 12:37:49,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:37:49,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:37:49,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:37:49,512 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:37:49,512 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:37:49,513 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-21 12:37:49,578 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/59f20c06c/55c3b550f8ef462babb86cbb1993b46a/FLAG802511b5b [2018-10-21 12:37:50,014 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:37:50,014 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-21 12:37:50,021 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/59f20c06c/55c3b550f8ef462babb86cbb1993b46a/FLAG802511b5b [2018-10-21 12:37:50,037 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/59f20c06c/55c3b550f8ef462babb86cbb1993b46a [2018-10-21 12:37:50,043 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:37:50,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:37:50,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:37:50,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:37:50,050 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:37:50,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,054 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 21.10 12:37:50, skipping insertion in model container [2018-10-21 12:37:50,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:37:50,091 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:37:50,313 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:37:50,317 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:37:50,337 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:37:50,356 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:37:50,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50 WrapperNode [2018-10-21 12:37:50,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:37:50,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:37:50,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:37:50,358 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:37:50,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:37:50,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:37:50,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:37:50,382 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:37:50,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (1/1) ... [2018-10-21 12:37:50,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:37:50,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:37:50,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:37:50,411 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:37:50,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (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 [2018-10-21 12:37:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:37:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:37:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:37:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:37:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:37:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:37:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:37:50,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:37:50,836 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:37:50,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:37:50 BoogieIcfgContainer [2018-10-21 12:37:50,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:37:50,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:37:50,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:37:50,843 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:37:50,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:37:50" (1/3) ... [2018-10-21 12:37:50,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10213798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:37:50, skipping insertion in model container [2018-10-21 12:37:50,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:50" (2/3) ... [2018-10-21 12:37:50,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10213798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:37:50, skipping insertion in model container [2018-10-21 12:37:50,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:37:50" (3/3) ... [2018-10-21 12:37:50,847 INFO L112 eAbstractionObserver]: Analyzing ICFG afnp2014_true-unreach-call_true-termination.c.i [2018-10-21 12:37:50,858 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:37:50,867 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:37:50,901 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:37:50,977 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:37:50,980 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:37:50,980 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:37:50,980 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:37:50,980 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:37:50,981 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:37:50,983 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:37:50,983 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:37:50,983 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:37:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-21 12:37:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-21 12:37:51,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:51,028 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:51,030 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:51,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:51,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2008095039, now seen corresponding path program 1 times [2018-10-21 12:37:51,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:51,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:51,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:51,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:51,091 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:51,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:37:51,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:37:51,153 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:51,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:37:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:37:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:37:51,176 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-21 12:37:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:51,205 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-21 12:37:51,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:37:51,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-21 12:37:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:51,216 INFO L225 Difference]: With dead ends: 33 [2018-10-21 12:37:51,216 INFO L226 Difference]: Without dead ends: 14 [2018-10-21 12:37:51,220 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 [2018-10-21 12:37:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-21 12:37:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-21 12:37:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-21 12:37:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-21 12:37:51,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-21 12:37:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:51,255 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-21 12:37:51,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:37:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-21 12:37:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-21 12:37:51,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:51,256 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:51,257 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:51,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1404763780, now seen corresponding path program 1 times [2018-10-21 12:37:51,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:51,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:51,259 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:51,393 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:37:51,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-21 12:37:51,394 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:51,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-21 12:37:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-21 12:37:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-21 12:37:51,396 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-21 12:37:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:51,503 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-21 12:37:51,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:37:51,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-21 12:37:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:51,506 INFO L225 Difference]: With dead ends: 23 [2018-10-21 12:37:51,506 INFO L226 Difference]: Without dead ends: 18 [2018-10-21 12:37:51,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:37:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-21 12:37:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-21 12:37:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-21 12:37:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-21 12:37:51,513 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2018-10-21 12:37:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:51,513 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-21 12:37:51,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-21 12:37:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-21 12:37:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-21 12:37:51,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:51,515 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:51,516 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:51,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash 108470830, now seen corresponding path program 1 times [2018-10-21 12:37:51,517 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:51,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:51,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:51,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:51,519 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:51,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:51,669 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:37:51,670 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-10-21 12:37:51,673 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [10], [13], [19], [21], [28], [31], [33], [39], [40], [41], [43] [2018-10-21 12:37:51,721 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:37:51,722 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:37:52,225 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:37:52,228 INFO L272 AbstractInterpreter]: Visited 14 different actions 110 times. Merged at 5 different actions 55 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-21 12:37:52,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:52,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:37:52,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:52,280 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 [2018-10-21 12:37:52,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:52,295 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:37:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:52,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:37:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:52,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:37:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:52,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:52,670 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 [2018-10-21 12:37:52,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:52,699 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:37:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:52,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:37:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:52,811 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:37:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:52,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:37:52,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 8 [2018-10-21 12:37:52,864 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:37:52,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-21 12:37:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-21 12:37:52,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-21 12:37:52,866 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2018-10-21 12:37:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:52,988 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-21 12:37:52,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-21 12:37:52,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-21 12:37:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:52,990 INFO L225 Difference]: With dead ends: 27 [2018-10-21 12:37:52,990 INFO L226 Difference]: Without dead ends: 22 [2018-10-21 12:37:52,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-21 12:37:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-21 12:37:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-21 12:37:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-21 12:37:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-21 12:37:52,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2018-10-21 12:37:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:52,997 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-21 12:37:52,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-21 12:37:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-21 12:37:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-21 12:37:52,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:52,998 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:52,998 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:52,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash -238722856, now seen corresponding path program 2 times [2018-10-21 12:37:52,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:53,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:53,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:53,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:53,000 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:53,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:53,123 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:37:53,124 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:37:53,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:37:53,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:53,124 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 [2018-10-21 12:37:53,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:37:53,134 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:37:53,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:37:53,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:37:53,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:37:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:53,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:37:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:53,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:53,541 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 [2018-10-21 12:37:53,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:37:53,557 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:37:53,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:37:53,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:37:53,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:37:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:53,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:37:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:53,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:37:53,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 10 [2018-10-21 12:37:53,634 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:37:53,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-21 12:37:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-21 12:37:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-21 12:37:53,636 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2018-10-21 12:37:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:53,706 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-21 12:37:53,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:37:53,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-21 12:37:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:53,707 INFO L225 Difference]: With dead ends: 22 [2018-10-21 12:37:53,707 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:37:53,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-21 12:37:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:37:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:37:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:37:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:37:53,709 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-10-21 12:37:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:53,710 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:37:53,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-21 12:37:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:37:53,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:37:53,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:37:53,852 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:37:53,852 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:37:53,852 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:37:53,852 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:37:53,853 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:37:53,853 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:37:53,853 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2018-10-21 12:37:53,853 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2018-10-21 12:37:53,853 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-21 12:37:53,853 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2018-10-21 12:37:53,854 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 16) no Hoare annotation was computed. [2018-10-21 12:37:53,854 INFO L425 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2018-10-21 12:37:53,854 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 16) no Hoare annotation was computed. [2018-10-21 12:37:53,854 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)) [2018-10-21 12:37:53,854 INFO L421 ceAbstractionStarter]: At program point L13-7(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2018-10-21 12:37:53,854 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-21 12:37:53,855 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-21 12:37:53,855 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:37:53,855 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-21 12:37:53,855 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-21 12:37:53,855 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:37:53,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:37:53 BoogieIcfgContainer [2018-10-21 12:37:53,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:37:53,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:37:53,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:37:53,869 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:37:53,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:37:50" (3/4) ... [2018-10-21 12:37:53,874 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:37:53,880 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:37:53,881 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:37:53,881 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:37:53,886 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-10-21 12:37:53,887 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-21 12:37:53,887 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:37:53,943 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:37:53,943 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:37:53,944 INFO L168 Benchmark]: Toolchain (without parser) took 3900.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 953.2 MB in the beginning and 998.3 MB in the end (delta: -45.1 MB). Peak memory consumption was 125.3 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:53,946 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-21 12:37:53,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.62 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:53,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:53,949 INFO L168 Benchmark]: Boogie Preprocessor took 28.56 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:53,949 INFO L168 Benchmark]: RCFGBuilder took 426.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 942.5 MB in the beginning and 1.2 GB in the end (delta: -211.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:53,951 INFO L168 Benchmark]: TraceAbstraction took 3030.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 998.3 MB in the end (delta: 155.6 MB). Peak memory consumption was 155.6 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:53,951 INFO L168 Benchmark]: Witness Printer took 73.83 ms. Allocated memory is still 1.2 GB. Free memory is still 998.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:53,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 311.62 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.56 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 426.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 942.5 MB in the beginning and 1.2 GB in the end (delta: -211.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3030.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 998.3 MB in the end (delta: 155.6 MB). Peak memory consumption was 155.6 MB. Max. memory is 11.5 GB. * Witness Printer took 73.83 ms. Allocated memory is still 1.2 GB. Free memory is still 998.3 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, 2.9s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 14 SDslu, 111 SDs, 0 SdLazy, 41 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s 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, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 9817 SizeOfPredicates, 12 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...