./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c3fbe1c 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/loops/sum01_bug02_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5465a084053aead702161d951dd339bfa1665d5 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 14:57:10,511 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 14:57:10,514 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 14:57:10,526 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 14:57:10,527 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 14:57:10,528 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 14:57:10,529 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 14:57:10,532 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 14:57:10,534 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 14:57:10,535 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 14:57:10,536 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 14:57:10,536 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 14:57:10,537 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 14:57:10,539 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 14:57:10,540 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 14:57:10,541 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 14:57:10,542 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 14:57:10,545 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 14:57:10,547 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 14:57:10,549 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 14:57:10,551 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 14:57:10,552 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 14:57:10,555 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 14:57:10,556 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 14:57:10,556 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 14:57:10,557 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 14:57:10,558 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 14:57:10,560 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 14:57:10,561 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 14:57:10,563 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 14:57:10,563 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 14:57:10,564 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 14:57:10,564 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 14:57:10,564 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 14:57:10,566 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 14:57:10,567 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 14:57:10,567 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 14:57:10,584 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 14:57:10,584 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 14:57:10,586 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 14:57:10,586 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 14:57:10,586 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 14:57:10,586 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 14:57:10,587 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 14:57:10,587 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 14:57:10,587 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 14:57:10,587 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 14:57:10,587 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 14:57:10,588 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 14:57:10,588 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 14:57:10,588 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 14:57:10,589 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 14:57:10,590 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 14:57:10,590 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 14:57:10,590 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 14:57:10,591 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 14:57:10,591 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 14:57:10,591 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 14:57:10,591 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 14:57:10,591 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 14:57:10,592 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 14:57:10,593 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 14:57:10,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 14:57:10,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 14:57:10,593 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 14:57:10,594 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 14:57:10,594 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 14:57:10,594 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 14:57:10,595 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 14:57:10,595 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 14:57:10,595 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 14:57:10,595 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 -> c5465a084053aead702161d951dd339bfa1665d5 [2018-10-22 14:57:10,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 14:57:10,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 14:57:10,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 14:57:10,693 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 14:57:10,696 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 14:57:10,697 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-10-22 14:57:10,759 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/840e2842d/6ed6537dd2e641a8a7f3e0aa293e4306/FLAGf34eceddd [2018-10-22 14:57:11,258 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 14:57:11,259 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-10-22 14:57:11,267 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/840e2842d/6ed6537dd2e641a8a7f3e0aa293e4306/FLAGf34eceddd [2018-10-22 14:57:11,284 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/840e2842d/6ed6537dd2e641a8a7f3e0aa293e4306 [2018-10-22 14:57:11,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 14:57:11,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 14:57:11,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 14:57:11,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 14:57:11,298 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 14:57:11,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bfa2d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11, skipping insertion in model container [2018-10-22 14:57:11,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 14:57:11,341 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 14:57:11,547 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 14:57:11,551 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 14:57:11,569 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 14:57:11,585 INFO L193 MainTranslator]: Completed translation [2018-10-22 14:57:11,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11 WrapperNode [2018-10-22 14:57:11,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 14:57:11,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 14:57:11,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 14:57:11,587 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 14:57:11,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 14:57:11,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 14:57:11,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 14:57:11,609 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 14:57:11,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (1/1) ... [2018-10-22 14:57:11,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 14:57:11,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 14:57:11,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 14:57:11,629 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 14:57:11,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (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 14:57:11,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 14:57:11,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 14:57:11,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 14:57:11,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 14:57:11,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 14:57:11,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 14:57:11,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 14:57:11,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 14:57:12,042 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 14:57:12,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 02:57:12 BoogieIcfgContainer [2018-10-22 14:57:12,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 14:57:12,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 14:57:12,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 14:57:12,056 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 14:57:12,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 02:57:11" (1/3) ... [2018-10-22 14:57:12,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb8908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 02:57:12, skipping insertion in model container [2018-10-22 14:57:12,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 02:57:11" (2/3) ... [2018-10-22 14:57:12,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb8908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 02:57:12, skipping insertion in model container [2018-10-22 14:57:12,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 02:57:12" (3/3) ... [2018-10-22 14:57:12,065 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-10-22 14:57:12,081 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 14:57:12,090 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 14:57:12,113 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 14:57:12,148 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 14:57:12,149 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 14:57:12,149 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 14:57:12,149 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 14:57:12,149 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 14:57:12,150 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 14:57:12,150 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 14:57:12,151 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 14:57:12,151 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 14:57:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-22 14:57:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 14:57:12,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:12,187 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:12,189 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:12,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2007171518, now seen corresponding path program 1 times [2018-10-22 14:57:12,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:12,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:12,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:12,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:12,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:12,312 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 14:57:12,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 14:57:12,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 14:57:12,315 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 14:57:12,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 14:57:12,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 14:57:12,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 14:57:12,336 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-22 14:57:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:12,360 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-22 14:57:12,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 14:57:12,362 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 14:57:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:12,371 INFO L225 Difference]: With dead ends: 32 [2018-10-22 14:57:12,371 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 14:57:12,375 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 14:57:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 14:57:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-22 14:57:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 14:57:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-22 14:57:12,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-22 14:57:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:12,418 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-22 14:57:12,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 14:57:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-22 14:57:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 14:57:12,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:12,419 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:12,419 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:12,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1715017247, now seen corresponding path program 1 times [2018-10-22 14:57:12,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:12,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:12,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:12,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:12,421 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:12,713 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 14:57:12,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 14:57:12,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 14:57:12,714 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 14:57:12,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 14:57:12,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 14:57:12,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 14:57:12,718 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-22 14:57:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:12,853 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-22 14:57:12,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 14:57:12,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 14:57:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:12,855 INFO L225 Difference]: With dead ends: 25 [2018-10-22 14:57:12,855 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 14:57:12,856 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 14:57:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 14:57:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 14:57:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 14:57:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-22 14:57:12,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-10-22 14:57:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:12,864 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-22 14:57:12,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 14:57:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-22 14:57:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 14:57:12,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:12,866 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:12,866 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:12,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1428843034, now seen corresponding path program 1 times [2018-10-22 14:57:12,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:12,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:12,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:12,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:12,869 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:13,322 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-22 14:57:13,533 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-10-22 14:57:13,605 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 14:57:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:13,606 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 14:57:13,607 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-22 14:57:13,611 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-10-22 14:57:13,675 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 14:57:13,676 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 14:57:13,812 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 14:57:14,336 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 14:57:14,338 INFO L272 AbstractInterpreter]: Visited 15 different actions 204 times. Merged at 6 different actions 114 times. Widened at 1 different actions 15 times. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-10-22 14:57:14,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:14,383 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 14:57:14,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:14,384 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 14:57:14,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:14,404 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 14:57:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:14,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:14,861 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 14:57:14,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:15,548 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 14:57:15,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:15,571 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 14:57:15,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:15,591 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 14:57:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:15,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:15,672 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 14:57:15,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:15,728 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 14:57:15,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 14:57:15,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 21 [2018-10-22 14:57:15,734 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 14:57:15,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 14:57:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 14:57:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-10-22 14:57:15,740 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 14 states. [2018-10-22 14:57:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:16,235 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-10-22 14:57:16,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 14:57:16,236 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-10-22 14:57:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:16,241 INFO L225 Difference]: With dead ends: 45 [2018-10-22 14:57:16,241 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 14:57:16,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-10-22 14:57:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 14:57:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-22 14:57:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 14:57:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-10-22 14:57:16,250 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-10-22 14:57:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:16,250 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-10-22 14:57:16,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 14:57:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-10-22 14:57:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 14:57:16,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:16,252 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:16,252 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:16,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1947322111, now seen corresponding path program 1 times [2018-10-22 14:57:16,253 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:16,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:16,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:16,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:16,254 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:16,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:16,364 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 14:57:16,364 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 14:57:16,365 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-10-22 14:57:16,367 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 14:57:16,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 14:57:16,374 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 14:57:17,106 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 14:57:17,106 INFO L272 AbstractInterpreter]: Visited 16 different actions 504 times. Merged at 7 different actions 284 times. Widened at 1 different actions 37 times. Found 38 fixpoints after 2 different actions. Largest state had 7 variables. [2018-10-22 14:57:17,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:17,146 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 14:57:17,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:17,147 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 14:57:17,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:17,161 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 14:57:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:17,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:17,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:17,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:17,516 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 14:57:17,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:17,532 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 14:57:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:17,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:17,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:17,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 14:57:17,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-10-22 14:57:17,575 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 14:57:17,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 14:57:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 14:57:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-10-22 14:57:17,576 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-10-22 14:57:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:17,671 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-10-22 14:57:17,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 14:57:17,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-22 14:57:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:17,674 INFO L225 Difference]: With dead ends: 42 [2018-10-22 14:57:17,674 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 14:57:17,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-10-22 14:57:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 14:57:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-22 14:57:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 14:57:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-22 14:57:17,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2018-10-22 14:57:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:17,680 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-22 14:57:17,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 14:57:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-22 14:57:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 14:57:17,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:17,681 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:17,681 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:17,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:17,682 INFO L82 PathProgramCache]: Analyzing trace with hash 994455866, now seen corresponding path program 2 times [2018-10-22 14:57:17,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:17,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:17,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 14:57:17,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:17,683 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 14:57:18,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:18,178 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 14:57:18,178 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 14:57:18,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 14:57:18,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:18,179 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 14:57:18,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 14:57:18,191 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 14:57:18,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 14:57:18,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:18,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:18,536 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:19,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:19,112 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 14:57:19,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 14:57:19,128 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 14:57:19,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 14:57:19,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:19,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:19,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:19,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 14:57:19,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 13, 13] total 30 [2018-10-22 14:57:19,252 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 14:57:19,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 14:57:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 14:57:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-10-22 14:57:19,255 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 19 states. [2018-10-22 14:57:19,632 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-22 14:57:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:20,427 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-10-22 14:57:20,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 14:57:20,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2018-10-22 14:57:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:20,431 INFO L225 Difference]: With dead ends: 50 [2018-10-22 14:57:20,431 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 14:57:20,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 14:57:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 14:57:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2018-10-22 14:57:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 14:57:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-22 14:57:20,440 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2018-10-22 14:57:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:20,440 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-22 14:57:20,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 14:57:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-22 14:57:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 14:57:20,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:20,441 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:20,441 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:20,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1674514236, now seen corresponding path program 2 times [2018-10-22 14:57:20,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:20,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:20,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 14:57:20,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:20,443 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:20,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:20,526 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 14:57:20,526 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 14:57:20,527 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 14:57:20,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:20,527 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 14:57:20,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 14:57:20,536 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 14:57:20,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 14:57:20,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:20,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:20,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:20,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:20,721 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 14:57:20,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 14:57:20,737 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 14:57:20,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 14:57:20,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:20,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:20,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:20,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 14:57:20,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 16 [2018-10-22 14:57:20,835 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 14:57:20,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 14:57:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 14:57:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-10-22 14:57:20,836 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2018-10-22 14:57:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:20,947 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-10-22 14:57:20,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 14:57:20,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-10-22 14:57:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:20,949 INFO L225 Difference]: With dead ends: 44 [2018-10-22 14:57:20,949 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 14:57:20,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-10-22 14:57:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 14:57:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-22 14:57:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 14:57:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-10-22 14:57:20,955 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2018-10-22 14:57:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:20,956 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-10-22 14:57:20,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 14:57:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-10-22 14:57:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 14:57:20,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:20,957 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:20,957 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:20,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash 162653665, now seen corresponding path program 3 times [2018-10-22 14:57:20,958 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:20,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:20,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 14:57:20,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:20,959 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:21,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:21,090 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 14:57:21,091 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 14:57:21,091 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 14:57:21,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:21,091 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 14:57:21,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 14:57:21,100 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 14:57:21,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 14:57:21,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:21,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:21,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:21,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:21,461 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 14:57:21,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 14:57:21,483 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 14:57:21,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 14:57:21,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:21,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:21,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:21,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 14:57:21,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 18 [2018-10-22 14:57:21,606 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 14:57:21,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 14:57:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 14:57:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-10-22 14:57:21,608 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2018-10-22 14:57:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:21,754 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-22 14:57:21,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 14:57:21,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-22 14:57:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:21,756 INFO L225 Difference]: With dead ends: 49 [2018-10-22 14:57:21,757 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 14:57:21,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-10-22 14:57:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 14:57:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 14:57:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 14:57:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-22 14:57:21,766 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2018-10-22 14:57:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:21,766 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-22 14:57:21,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 14:57:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-22 14:57:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 14:57:21,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:21,769 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:21,769 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:21,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash 129265244, now seen corresponding path program 4 times [2018-10-22 14:57:21,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:21,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:21,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 14:57:21,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:21,773 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 14:57:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:21,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:21,974 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 14:57:21,974 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 14:57:21,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 14:57:21,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:21,975 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 14:57:21,995 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 14:57:21,996 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 14:57:22,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 14:57:22,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:22,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:22,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:22,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 14:57:22,529 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 14:57:22,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 14:57:22,545 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 14:57:22,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 14:57:22,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 14:57:22,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 14:57:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:22,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 14:57:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 14:57:22,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 14:57:22,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-10-22 14:57:22,695 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 14:57:22,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 14:57:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 14:57:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-22 14:57:22,696 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-22 14:57:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 14:57:22,799 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-10-22 14:57:22,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 14:57:22,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-10-22 14:57:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 14:57:22,802 INFO L225 Difference]: With dead ends: 55 [2018-10-22 14:57:22,802 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 14:57:22,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-22 14:57:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 14:57:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-10-22 14:57:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 14:57:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-22 14:57:22,808 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2018-10-22 14:57:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 14:57:22,809 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-22 14:57:22,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 14:57:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-22 14:57:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 14:57:22,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 14:57:22,810 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 14:57:22,810 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 14:57:22,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 14:57:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1609235137, now seen corresponding path program 5 times [2018-10-22 14:57:22,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 14:57:22,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:22,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 14:57:22,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 14:57:22,812 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 14:57:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 14:57:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 14:57:22,857 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 14:57:22,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 02:57:22 BoogieIcfgContainer [2018-10-22 14:57:22,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 14:57:22,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 14:57:22,893 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 14:57:22,893 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 14:57:22,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 02:57:12" (3/4) ... [2018-10-22 14:57:22,896 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-22 14:57:22,956 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 14:57:22,956 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 14:57:22,957 INFO L168 Benchmark]: Toolchain (without parser) took 11667.98 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 288.4 MB). Free memory was 949.1 MB in the beginning and 1.2 GB in the end (delta: -253.3 MB). Peak memory consumption was 35.1 MB. Max. memory is 11.5 GB. [2018-10-22 14:57:22,958 INFO L168 Benchmark]: CDTParser took 0.19 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 14:57:22,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.40 ms. Allocated memory is still 1.0 GB. Free memory was 949.1 MB in the beginning and 938.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 14:57:22,959 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.71 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 14:57:22,960 INFO L168 Benchmark]: Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 14:57:22,960 INFO L168 Benchmark]: RCFGBuilder took 414.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.7 MB). Free memory was 938.4 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-22 14:57:22,961 INFO L168 Benchmark]: TraceAbstraction took 10842.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 133.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -70.2 MB). Peak memory consumption was 63.5 MB. Max. memory is 11.5 GB. [2018-10-22 14:57:22,962 INFO L168 Benchmark]: Witness Printer took 63.77 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 14:57:22,965 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 294.40 ms. Allocated memory is still 1.0 GB. Free memory was 949.1 MB in the beginning and 938.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.71 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 414.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.7 MB). Free memory was 938.4 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10842.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 133.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -70.2 MB). Peak memory consumption was 63.5 MB. Max. memory is 11.5 GB. * Witness Printer took 63.77 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i