java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 16:05:16,665 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 16:05:16,667 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 16:05:16,684 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 16:05:16,684 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 16:05:16,686 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 16:05:16,688 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 16:05:16,690 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 16:05:16,693 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 16:05:16,700 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 16:05:16,701 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 16:05:16,702 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 16:05:16,705 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 16:05:16,706 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 16:05:16,709 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 16:05:16,710 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 16:05:16,711 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 16:05:16,713 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 16:05:16,719 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 16:05:16,725 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 16:05:16,726 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 16:05:16,727 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 16:05:16,733 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 16:05:16,733 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 16:05:16,734 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 16:05:16,735 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 16:05:16,736 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 16:05:16,737 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 16:05:16,738 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 16:05:16,741 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 16:05:16,741 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 16:05:16,742 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 16:05:16,742 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 16:05:16,742 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 16:05:16,746 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 16:05:16,746 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 16:05:16,747 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-22 16:05:16,773 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 16:05:16,774 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 16:05:16,775 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 16:05:16,775 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 16:05:16,775 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 16:05:16,775 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 16:05:16,775 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 16:05:16,776 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 16:05:16,776 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 16:05:16,776 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 16:05:16,776 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 16:05:16,777 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 16:05:16,777 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 16:05:16,778 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 16:05:16,778 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 16:05:16,778 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 16:05:16,778 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 16:05:16,778 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 16:05:16,779 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 16:05:16,779 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 16:05:16,779 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 16:05:16,779 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 16:05:16,779 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 16:05:16,780 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 16:05:16,780 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 16:05:16,780 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 16:05:16,780 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 16:05:16,780 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 16:05:16,781 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 16:05:16,781 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 16:05:16,781 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 16:05:16,781 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 16:05:16,781 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 16:05:16,782 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 16:05:16,848 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 16:05:16,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 16:05:16,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 16:05:16,872 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 16:05:16,873 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 16:05:16,875 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-10-22 16:05:16,939 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0021317c/c5cb10e6d3134ac78ead28aff26bcdd9/FLAG35185a096 [2018-10-22 16:05:17,375 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 16:05:17,376 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-10-22 16:05:17,383 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0021317c/c5cb10e6d3134ac78ead28aff26bcdd9/FLAG35185a096 [2018-10-22 16:05:17,399 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0021317c/c5cb10e6d3134ac78ead28aff26bcdd9 [2018-10-22 16:05:17,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 16:05:17,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 16:05:17,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 16:05:17,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 16:05:17,417 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 16:05:17,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaf1b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17, skipping insertion in model container [2018-10-22 16:05:17,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 16:05:17,448 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 16:05:17,627 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:05:17,631 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 16:05:17,649 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:05:17,665 INFO L193 MainTranslator]: Completed translation [2018-10-22 16:05:17,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17 WrapperNode [2018-10-22 16:05:17,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 16:05:17,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 16:05:17,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 16:05:17,667 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 16:05:17,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 16:05:17,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 16:05:17,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 16:05:17,691 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 16:05:17,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (1/1) ... [2018-10-22 16:05:17,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 16:05:17,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 16:05:17,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 16:05:17,714 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 16:05:17,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (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 16:05:17,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 16:05:17,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 16:05:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 16:05:17,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 16:05:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 16:05:17,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 16:05:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 16:05:17,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 16:05:18,204 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 16:05:18,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:05:18 BoogieIcfgContainer [2018-10-22 16:05:18,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 16:05:18,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 16:05:18,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 16:05:18,209 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 16:05:18,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 04:05:17" (1/3) ... [2018-10-22 16:05:18,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360f52c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:05:18, skipping insertion in model container [2018-10-22 16:05:18,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:05:17" (2/3) ... [2018-10-22 16:05:18,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360f52c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:05:18, skipping insertion in model container [2018-10-22 16:05:18,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:05:18" (3/3) ... [2018-10-22 16:05:18,213 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call2_true-termination.i [2018-10-22 16:05:18,223 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 16:05:18,231 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 16:05:18,247 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 16:05:18,280 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 16:05:18,281 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 16:05:18,281 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 16:05:18,281 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 16:05:18,281 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 16:05:18,281 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 16:05:18,282 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 16:05:18,282 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 16:05:18,282 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 16:05:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 16:05:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 16:05:18,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:05:18,308 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:05:18,310 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:05:18,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:05:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-22 16:05:18,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:05:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:18,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:05:18,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:18,379 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:05:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:18,444 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 16:05:18,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:05:18,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 16:05:18,448 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:05:18,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 16:05:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 16:05:18,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:05:18,468 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 16:05:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:05:18,494 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 16:05:18,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 16:05:18,496 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 16:05:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:05:18,503 INFO L225 Difference]: With dead ends: 29 [2018-10-22 16:05:18,504 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 16:05:18,507 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 16:05:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 16:05:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 16:05:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 16:05:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 16:05:18,543 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 16:05:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:05:18,543 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 16:05:18,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 16:05:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 16:05:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 16:05:18,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:05:18,545 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:05:18,545 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:05:18,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:05:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-22 16:05:18,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:05:18,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:18,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:05:18,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:18,548 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:05:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:18,698 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 16:05:18,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:05:18,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 16:05:18,698 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:05:18,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 16:05:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 16:05:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 16:05:18,701 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-22 16:05:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:05:18,716 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 16:05:18,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 16:05:18,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 16:05:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:05:18,720 INFO L225 Difference]: With dead ends: 19 [2018-10-22 16:05:18,720 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 16:05:18,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 16:05:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 16:05:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 16:05:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 16:05:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 16:05:18,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 16:05:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:05:18,728 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 16:05:18,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 16:05:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 16:05:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 16:05:18,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:05:18,729 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:05:18,730 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:05:18,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:05:18,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-22 16:05:18,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:05:18,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:18,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:05:18,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:18,732 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:05:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:18,958 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 16:05:18,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:18,958 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:05:18,962 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 16:05:18,966 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-22 16:05:19,010 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:05:19,010 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:05:19,131 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:05:19,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:05:19,356 INFO L272 AbstractInterpreter]: Visited 12 different actions 67 times. Merged at 3 different actions 25 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-22 16:05:19,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:05:19,402 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:05:19,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:19,402 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 16:05:19,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:05:19,422 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:05:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:19,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:05:19,496 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 16:05:19,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:05:19,789 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 16:05:19,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:19,818 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 16:05:19,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:05:19,837 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:05:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:19,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:05:19,950 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 16:05:19,952 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:05:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:20,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:05:20,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 4, 4] total 11 [2018-10-22 16:05:20,168 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:05:20,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 16:05:20,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 16:05:20,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:05:20,171 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-22 16:05:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:05:20,187 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 16:05:20,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 16:05:20,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 16:05:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:05:20,189 INFO L225 Difference]: With dead ends: 21 [2018-10-22 16:05:20,189 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 16:05:20,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:05:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 16:05:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 16:05:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 16:05:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 16:05:20,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 16:05:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:05:20,195 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 16:05:20,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 16:05:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 16:05:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 16:05:20,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:05:20,196 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:05:20,196 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:05:20,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:05:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-10-22 16:05:20,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:05:20,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:20,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:05:20,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:20,198 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:05:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:20,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:20,358 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:05:20,358 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:05:20,358 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:05:20,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:20,359 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 16:05:20,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:05:20,370 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:05:20,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:05:20,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:05:20,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:05:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:20,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:05:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:20,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:20,748 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 16:05:20,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:05:20,765 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:05:20,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:05:20,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:05:20,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:05:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:20,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:05:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:20,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:05:20,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 5, 5] total 14 [2018-10-22 16:05:20,932 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:05:20,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 16:05:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 16:05:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-22 16:05:20,934 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-22 16:05:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:05:20,968 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 16:05:20,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 16:05:20,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-22 16:05:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:05:20,970 INFO L225 Difference]: With dead ends: 23 [2018-10-22 16:05:20,971 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 16:05:20,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-22 16:05:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 16:05:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 16:05:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 16:05:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 16:05:20,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 16:05:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:05:20,976 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 16:05:20,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 16:05:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 16:05:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 16:05:20,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:05:20,978 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:05:20,978 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:05:20,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:05:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-10-22 16:05:20,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:05:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:20,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:05:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:05:20,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:05:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:05:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:05:21,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:21,390 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:05:21,391 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:05:21,391 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:05:21,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:05:21,391 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 16:05:21,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:05:21,409 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:05:21,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 16:05:21,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:05:21,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:05:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:05:21,545 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:05:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:05:21,679 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:05:21,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6] total 13 [2018-10-22 16:05:21,680 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:05:21,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:05:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:05:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-22 16:05:21,681 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-10-22 16:05:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:05:21,725 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-22 16:05:21,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 16:05:21,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-22 16:05:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:05:21,726 INFO L225 Difference]: With dead ends: 18 [2018-10-22 16:05:21,726 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 16:05:21,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-22 16:05:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 16:05:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 16:05:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 16:05:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 16:05:21,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-10-22 16:05:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:05:21,729 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 16:05:21,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:05:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 16:05:21,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 16:05:21,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 16:05:21,791 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 16:05:21,791 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:05:21,791 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:05:21,791 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 16:05:21,792 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 16:05:21,792 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 16:05:21,792 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-10-22 16:05:21,792 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-10-22 16:05:21,792 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-10-22 16:05:21,792 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-10-22 16:05:21,793 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (and (<= main_~x~0 0) (<= 0 main_~x~0)) (< (mod (+ main_~x~0 4294967295) 4294967296) 6)) [2018-10-22 16:05:21,793 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 6) (<= 6 (mod main_~x~0 4294967296))) [2018-10-22 16:05:21,793 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-22 16:05:21,793 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-22 16:05:21,793 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-22 16:05:21,794 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-22 16:05:21,794 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-22 16:05:21,794 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-22 16:05:21,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:05:21 BoogieIcfgContainer [2018-10-22 16:05:21,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:05:21,806 INFO L168 Benchmark]: Toolchain (without parser) took 4393.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -646.8 MB). Peak memory consumption was 149.1 MB. Max. memory is 7.1 GB. [2018-10-22 16:05:21,808 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:05:21,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 16:05:21,810 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:05:21,810 INFO L168 Benchmark]: Boogie Preprocessor took 22.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:05:21,811 INFO L168 Benchmark]: RCFGBuilder took 491.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -845.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-22 16:05:21,812 INFO L168 Benchmark]: TraceAbstraction took 3599.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 188.2 MB). Peak memory consumption was 188.2 MB. Max. memory is 7.1 GB. [2018-10-22 16:05:21,817 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 23.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 491.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -845.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3599.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 188.2 MB). Peak memory consumption was 188.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 11]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || (x + 4294967295) % 4294967296 < 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 3.5s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 2 SDslu, 81 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 33 HoareAnnotationTreeSize, 11 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 139 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 9621 SizeOfPredicates, 5 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 24/76 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...