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-lit/cggmp2005b_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 04:13:11,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:13:11,616 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:13:11,633 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:13:11,633 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:13:11,634 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:13:11,636 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:13:11,637 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:13:11,639 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:13:11,640 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:13:11,641 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:13:11,641 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:13:11,642 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:13:11,643 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:13:11,644 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:13:11,645 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:13:11,646 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:13:11,648 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:13:11,650 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:13:11,651 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:13:11,652 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:13:11,654 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:13:11,657 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 04:13:11,658 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 04:13:11,658 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 04:13:11,659 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 04:13:11,660 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 04:13:11,660 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 04:13:11,661 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 04:13:11,662 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 04:13:11,663 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 04:13:11,663 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 04:13:11,664 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 04:13:11,664 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 04:13:11,665 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 04:13:11,665 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 04:13:11,666 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 [2018-10-27 04:13:11,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:13:11,693 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:13:11,695 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 04:13:11,695 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 04:13:11,695 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 04:13:11,695 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 04:13:11,696 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 04:13:11,696 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 04:13:11,696 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 04:13:11,696 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 04:13:11,696 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 04:13:11,696 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 04:13:11,697 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:13:11,698 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:13:11,698 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:13:11,698 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 04:13:11,698 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:13:11,698 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 04:13:11,698 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 04:13:11,699 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 04:13:11,699 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:13:11,699 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:13:11,699 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:13:11,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:13:11,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:13:11,701 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:13:11,702 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:13:11,702 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 04:13:11,702 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 04:13:11,702 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:13:11,702 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 04:13:11,703 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 04:13:11,703 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 04:13:11,703 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 04:13:11,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:13:11,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:13:11,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:13:11,784 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:13:11,785 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:13:11,785 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b_true-unreach-call_true-termination.c.i [2018-10-27 04:13:11,839 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c41da57df/d32bb6c7aaa846b18dc0e396cc9cb8a3/FLAG935a3b57e [2018-10-27 04:13:12,237 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:13:12,238 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b_true-unreach-call_true-termination.c.i [2018-10-27 04:13:12,246 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c41da57df/d32bb6c7aaa846b18dc0e396cc9cb8a3/FLAG935a3b57e [2018-10-27 04:13:12,261 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c41da57df/d32bb6c7aaa846b18dc0e396cc9cb8a3 [2018-10-27 04:13:12,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:13:12,275 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 04:13:12,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:13:12,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:13:12,279 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:13:12,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4599f062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12, skipping insertion in model container [2018-10-27 04:13:12,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:13:12,317 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:13:12,500 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:13:12,505 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:13:12,523 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:13:12,539 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:13:12,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12 WrapperNode [2018-10-27 04:13:12,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:13:12,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 04:13:12,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 04:13:12,541 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 04:13:12,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 04:13:12,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:13:12,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:13:12,564 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:13:12,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... [2018-10-27 04:13:12,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:13:12,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:13:12,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:13:12,588 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:13:12,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:13:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:13:12,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:13:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:13:12,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:13:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:13:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:13:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 04:13:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 04:13:13,009 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:13:13,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:13:13 BoogieIcfgContainer [2018-10-27 04:13:13,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:13:13,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:13:13,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:13:13,015 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:13:13,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:13:12" (1/3) ... [2018-10-27 04:13:13,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6956d099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:13:13, skipping insertion in model container [2018-10-27 04:13:13,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:12" (2/3) ... [2018-10-27 04:13:13,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6956d099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:13:13, skipping insertion in model container [2018-10-27 04:13:13,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:13:13" (3/3) ... [2018-10-27 04:13:13,029 INFO L112 eAbstractionObserver]: Analyzing ICFG cggmp2005b_true-unreach-call_true-termination.c.i [2018-10-27 04:13:13,043 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:13:13,052 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 04:13:13,067 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 04:13:13,098 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:13:13,098 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 04:13:13,098 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:13:13,098 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:13:13,099 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:13:13,099 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:13:13,099 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:13:13,099 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:13:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-27 04:13:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 04:13:13,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:13,126 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:13,128 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:13,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -557638975, now seen corresponding path program 1 times [2018-10-27 04:13:13,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:13,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:13,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:13,251 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:13:13,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:13:13,252 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:13:13,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 04:13:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 04:13:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:13:13,270 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-27 04:13:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:13,294 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2018-10-27 04:13:13,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 04:13:13,296 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-27 04:13:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:13,304 INFO L225 Difference]: With dead ends: 43 [2018-10-27 04:13:13,304 INFO L226 Difference]: Without dead ends: 17 [2018-10-27 04:13:13,308 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 [2018-10-27 04:13:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-27 04:13:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-27 04:13:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 04:13:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-27 04:13:13,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2018-10-27 04:13:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:13,344 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-27 04:13:13,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 04:13:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-27 04:13:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-27 04:13:13,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:13,345 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:13,346 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:13,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1155614924, now seen corresponding path program 1 times [2018-10-27 04:13:13,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:13,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:13,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,349 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:13,433 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:13:13,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:13:13,434 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:13:13,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:13:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:13:13,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:13:13,436 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2018-10-27 04:13:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:13,499 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-27 04:13:13,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:13:13,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-27 04:13:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:13,501 INFO L225 Difference]: With dead ends: 24 [2018-10-27 04:13:13,501 INFO L226 Difference]: Without dead ends: 19 [2018-10-27 04:13:13,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:13:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-27 04:13:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-27 04:13:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-27 04:13:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-27 04:13:13,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2018-10-27 04:13:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:13,508 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-27 04:13:13,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:13:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-27 04:13:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-27 04:13:13,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:13,509 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:13,510 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:13,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -220474704, now seen corresponding path program 1 times [2018-10-27 04:13:13,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:13,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:13,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,512 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:13,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:13:13,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:13:13,585 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:13:13,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:13:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:13:13,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:13:13,586 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2018-10-27 04:13:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:13,628 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-27 04:13:13,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:13:13,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-10-27 04:13:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:13,630 INFO L225 Difference]: With dead ends: 33 [2018-10-27 04:13:13,630 INFO L226 Difference]: Without dead ends: 21 [2018-10-27 04:13:13,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:13:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-27 04:13:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-27 04:13:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 04:13:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-27 04:13:13,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2018-10-27 04:13:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:13,637 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-27 04:13:13,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:13:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-27 04:13:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-27 04:13:13,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:13,638 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:13,639 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:13,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:13,639 INFO L82 PathProgramCache]: Analyzing trace with hash 260416874, now seen corresponding path program 1 times [2018-10-27 04:13:13,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:13,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:13,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:13,641 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 04:13:13,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:13,714 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:13:13,715 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-27 04:13:13,717 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [22], [24], [28], [32], [36], [48], [51], [53], [59], [60], [61], [63] [2018-10-27 04:13:13,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:13:13,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:13:14,467 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:13:14,468 INFO L272 AbstractInterpreter]: Visited 18 different actions 419 times. Merged at 8 different actions 294 times. Widened at 4 different actions 120 times. Found 32 fixpoints after 4 different actions. Largest state had 3 variables. [2018-10-27 04:13:14,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:14,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:13:14,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:14,504 INFO L194 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 [2018-10-27 04:13:14,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:14,520 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:13:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:14,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:13:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 04:13:14,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:13:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 04:13:14,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:13:14,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2018-10-27 04:13:14,737 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:13:14,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:13:14,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:13:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 04:13:14,738 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2018-10-27 04:13:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:14,794 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-27 04:13:14,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:13:14,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-27 04:13:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:14,796 INFO L225 Difference]: With dead ends: 33 [2018-10-27 04:13:14,796 INFO L226 Difference]: Without dead ends: 28 [2018-10-27 04:13:14,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 04:13:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-27 04:13:14,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-27 04:13:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-27 04:13:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-10-27 04:13:14,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2018-10-27 04:13:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:14,805 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-10-27 04:13:14,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:13:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-10-27 04:13:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-27 04:13:14,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:13:14,807 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:13:14,807 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:13:14,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:13:14,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1089248186, now seen corresponding path program 2 times [2018-10-27 04:13:14,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:13:14,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:14,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:13:14,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:13:14,809 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:13:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:13:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:13:14,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:14,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:13:14,911 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:13:14,912 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:13:14,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:13:14,912 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:13:14,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:13:14,926 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 04:13:14,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-27 04:13:14,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:13:14,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:13:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 04:13:15,223 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:13:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 04:13:15,329 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:13:15,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 10 [2018-10-27 04:13:15,329 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:13:15,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 04:13:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 04:13:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:13:15,331 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2018-10-27 04:13:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:13:15,373 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-10-27 04:13:15,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:13:15,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-10-27 04:13:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:13:15,375 INFO L225 Difference]: With dead ends: 42 [2018-10-27 04:13:15,376 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 04:13:15,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-10-27 04:13:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 04:13:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 04:13:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 04:13:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 04:13:15,378 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-10-27 04:13:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:13:15,378 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 04:13:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 04:13:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 04:13:15,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 04:13:15,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 04:13:15,450 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 04:13:15,451 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 04:13:15,451 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 04:13:15,451 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 04:13:15,451 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 04:13:15,451 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 04:13:15,452 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-10-27 04:13:15,452 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 27) no Hoare annotation was computed. [2018-10-27 04:13:15,452 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 23) no Hoare annotation was computed. [2018-10-27 04:13:15,452 INFO L421 ceAbstractionStarter]: At program point L21-3(lines 21 23) the Hoare annotation is: (= main_~k~0 4) [2018-10-27 04:13:15,452 INFO L421 ceAbstractionStarter]: At program point L21-4(lines 15 24) the Hoare annotation is: (or (= main_~k~0 4) (and (<= (+ main_~j~0 100) 0) (<= main_~i~0 0))) [2018-10-27 04:13:15,453 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 19) no Hoare annotation was computed. [2018-10-27 04:13:15,453 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 24) no Hoare annotation was computed. [2018-10-27 04:13:15,453 INFO L421 ceAbstractionStarter]: At program point L17-3(lines 17 19) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2018-10-27 04:13:15,453 INFO L425 ceAbstractionStarter]: For program point L17-4(lines 17 19) no Hoare annotation was computed. [2018-10-27 04:13:15,453 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 27) no Hoare annotation was computed. [2018-10-27 04:13:15,453 INFO L421 ceAbstractionStarter]: At program point L15-3(lines 15 24) the Hoare annotation is: (= main_~k~0 4) [2018-10-27 04:13:15,454 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 27) the Hoare annotation is: true [2018-10-27 04:13:15,454 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-27 04:13:15,454 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-27 04:13:15,454 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-27 04:13:15,454 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-27 04:13:15,454 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-27 04:13:15,455 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-27 04:13:15,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:13:15 BoogieIcfgContainer [2018-10-27 04:13:15,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 04:13:15,467 INFO L168 Benchmark]: Toolchain (without parser) took 3193.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -645.4 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:15,469 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-10-27 04:13:15,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.62 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. [2018-10-27 04:13:15,470 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.65 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. [2018-10-27 04:13:15,471 INFO L168 Benchmark]: Boogie Preprocessor took 23.84 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. [2018-10-27 04:13:15,472 INFO L168 Benchmark]: RCFGBuilder took 423.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:15,473 INFO L168 Benchmark]: TraceAbstraction took 2454.89 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 153.7 MB). Peak memory consumption was 153.7 MB. Max. memory is 7.1 GB. [2018-10-27 04:13:15,478 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 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.62 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 22.65 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 23.84 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 423.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2454.89 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 153.7 MB). Peak memory consumption was 153.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: k == 4 || (j + 100 <= 0 && i <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 6 SDslu, 110 SDs, 0 SdLazy, 21 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s 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, 9 LocationsWithAnnotation, 14 PreInvPairs, 23 NumberOfFragments, 31 HoareAnnotationTreeSize, 14 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 133 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 171 ConstructedInterpolants, 0 QuantifiedInterpolants, 6811 SizeOfPredicates, 3 NumberOfNonLiveVariables, 78 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 49/59 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...