java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 15:50:24,196 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 15:50:24,198 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 15:50:24,209 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 15:50:24,210 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 15:50:24,211 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 15:50:24,212 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 15:50:24,214 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 15:50:24,216 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 15:50:24,216 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 15:50:24,217 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 15:50:24,218 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 15:50:24,218 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 15:50:24,219 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 15:50:24,221 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 15:50:24,221 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 15:50:24,222 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 15:50:24,224 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 15:50:24,226 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 15:50:24,228 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 15:50:24,229 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 15:50:24,230 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 15:50:24,232 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 15:50:24,233 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 15:50:24,233 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 15:50:24,234 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 15:50:24,235 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 15:50:24,236 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 15:50:24,236 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 15:50:24,238 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 15:50:24,238 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 15:50:24,239 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 15:50:24,239 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 15:50:24,239 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 15:50:24,244 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 15:50:24,245 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 15:50:24,246 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 15:50:24,268 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 15:50:24,271 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 15:50:24,272 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 15:50:24,273 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 15:50:24,273 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 15:50:24,273 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 15:50:24,273 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 15:50:24,274 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 15:50:24,274 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 15:50:24,274 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 15:50:24,274 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 15:50:24,275 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 15:50:24,275 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 15:50:24,276 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 15:50:24,277 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 15:50:24,277 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 15:50:24,277 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 15:50:24,277 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 15:50:24,277 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 15:50:24,278 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 15:50:24,278 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 15:50:24,278 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 15:50:24,278 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 15:50:24,278 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 15:50:24,280 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 15:50:24,280 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 15:50:24,280 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 15:50:24,280 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 15:50:24,280 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 15:50:24,281 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 15:50:24,281 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 15:50:24,281 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 15:50:24,281 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 15:50:24,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 15:50:24,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 15:50:24,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 15:50:24,357 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 15:50:24,357 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 15:50:24,358 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-09-14 15:50:24,715 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4e20133/cbd68f6bc791438795a13e5957261da5/FLAGe8d68e6a5 [2018-09-14 15:50:24,835 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 15:50:24,835 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-09-14 15:50:24,840 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4e20133/cbd68f6bc791438795a13e5957261da5/FLAGe8d68e6a5 [2018-09-14 15:50:24,855 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4e20133/cbd68f6bc791438795a13e5957261da5 [2018-09-14 15:50:24,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 15:50:24,869 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 15:50:24,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 15:50:24,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 15:50:24,879 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 15:50:24,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:50:24" (1/1) ... [2018-09-14 15:50:24,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408707bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:24, skipping insertion in model container [2018-09-14 15:50:24,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:50:24" (1/1) ... [2018-09-14 15:50:24,895 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 15:50:25,125 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:50:25,140 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 15:50:25,143 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:50:25,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25 WrapperNode [2018-09-14 15:50:25,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 15:50:25,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 15:50:25,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 15:50:25,155 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 15:50:25,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 15:50:25,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 15:50:25,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 15:50:25,172 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 15:50:25,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... [2018-09-14 15:50:25,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 15:50:25,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 15:50:25,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 15:50:25,189 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 15:50:25,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:50:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 15:50:25,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 15:50:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 15:50:25,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 15:50:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 15:50:25,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 15:50:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-14 15:50:25,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-14 15:50:25,460 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 15:50:25,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:50:25 BoogieIcfgContainer [2018-09-14 15:50:25,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 15:50:25,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 15:50:25,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 15:50:25,465 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 15:50:25,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 03:50:24" (1/3) ... [2018-09-14 15:50:25,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e917f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:50:25, skipping insertion in model container [2018-09-14 15:50:25,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:50:25" (2/3) ... [2018-09-14 15:50:25,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e917f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:50:25, skipping insertion in model container [2018-09-14 15:50:25,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:50:25" (3/3) ... [2018-09-14 15:50:25,468 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call2_true-termination.i [2018-09-14 15:50:25,478 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 15:50:25,485 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 15:50:25,528 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 15:50:25,529 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 15:50:25,529 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 15:50:25,529 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 15:50:25,529 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 15:50:25,529 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 15:50:25,529 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 15:50:25,530 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 15:50:25,530 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 15:50:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-09-14 15:50:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-14 15:50:25,550 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:50:25,551 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:50:25,551 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:50:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-09-14 15:50:25,558 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:50:25,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:25,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:50:25,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:25,612 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:50:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:25,666 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:50:25,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-14 15:50:25,667 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:50:25,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-14 15:50:25,682 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-14 15:50:25,683 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 15:50:25,685 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-09-14 15:50:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:50:25,705 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-09-14 15:50:25,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-14 15:50:25,707 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-09-14 15:50:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:50:25,715 INFO L225 Difference]: With dead ends: 29 [2018-09-14 15:50:25,715 INFO L226 Difference]: Without dead ends: 12 [2018-09-14 15:50:25,718 INFO L604 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 [2018-09-14 15:50:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-14 15:50:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-14 15:50:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-14 15:50:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-14 15:50:25,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-14 15:50:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:50:25,757 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-14 15:50:25,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-14 15:50:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-14 15:50:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-14 15:50:25,758 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:50:25,758 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:50:25,759 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:50:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-09-14 15:50:25,760 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:50:25,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:25,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:50:25,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:25,761 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:50:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:25,937 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:50:25,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 15:50:25,938 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:50:25,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 15:50:25,941 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 15:50:25,941 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 15:50:25,942 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-09-14 15:50:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:50:26,004 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-14 15:50:26,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 15:50:26,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-09-14 15:50:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:50:26,006 INFO L225 Difference]: With dead ends: 19 [2018-09-14 15:50:26,006 INFO L226 Difference]: Without dead ends: 14 [2018-09-14 15:50:26,007 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 15:50:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-14 15:50:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-14 15:50:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-14 15:50:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-14 15:50:26,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-14 15:50:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:50:26,015 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-14 15:50:26,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 15:50:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-14 15:50:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-14 15:50:26,019 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:50:26,020 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:50:26,020 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:50:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-09-14 15:50:26,021 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:50:26,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:26,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:50:26,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:26,022 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:50:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:26,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:50:26,268 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:50:26,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:50:26,285 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:50:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:26,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:50:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:26,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:50:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:26,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:50:26,629 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:50:26,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:50:26,649 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:50:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:26,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:50:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:26,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:50:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:26,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:50:26,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 4, 4] total 11 [2018-09-14 15:50:26,988 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:50:26,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 15:50:26,989 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 15:50:26,989 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 15:50:26,991 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-09-14 15:50:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:50:27,033 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-14 15:50:27,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 15:50:27,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-09-14 15:50:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:50:27,036 INFO L225 Difference]: With dead ends: 21 [2018-09-14 15:50:27,036 INFO L226 Difference]: Without dead ends: 16 [2018-09-14 15:50:27,037 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 15:50:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-14 15:50:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-14 15:50:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-14 15:50:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-14 15:50:27,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-14 15:50:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:50:27,044 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-14 15:50:27,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 15:50:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-14 15:50:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-14 15:50:27,046 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:50:27,046 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:50:27,047 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:50:27,047 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-09-14 15:50:27,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:50:27,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:27,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:50:27,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:27,049 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:50:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:27,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:50:27,214 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:50:27,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:50:27,224 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:50:27,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:50:27,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:50:27,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:50:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:27,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:50:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:27,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:50:27,611 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:50:27,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:50:27,627 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:50:27,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:50:27,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:50:27,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:50:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:27,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:50:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (5)] Exception during sending of exit command (exit): Broken pipe [2018-09-14 15:50:27,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:50:27,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 5, 5] total 14 [2018-09-14 15:50:27,902 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:50:27,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 15:50:27,903 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 15:50:27,904 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-09-14 15:50:27,904 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-09-14 15:50:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:50:27,931 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-14 15:50:27,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 15:50:27,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-09-14 15:50:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:50:27,935 INFO L225 Difference]: With dead ends: 23 [2018-09-14 15:50:27,935 INFO L226 Difference]: Without dead ends: 18 [2018-09-14 15:50:27,936 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-09-14 15:50:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-14 15:50:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-14 15:50:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-14 15:50:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-14 15:50:27,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-14 15:50:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:50:27,940 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-14 15:50:27,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 15:50:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-14 15:50:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-14 15:50:27,942 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:50:27,942 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:50:27,942 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:50:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-09-14 15:50:27,942 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:50:27,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:27,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:50:27,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:50:27,944 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:50:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:50:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:28,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:50:28,384 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:50:28,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-14 15:50:28,401 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-14 15:50:28,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-14 15:50:28,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:50:28,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:50:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 15:50:28,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:50:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 15:50:28,762 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 15:50:28,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6] total 13 [2018-09-14 15:50:28,762 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:50:28,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 15:50:28,763 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 15:50:28,763 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-09-14 15:50:28,764 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-09-14 15:50:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:50:28,810 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-14 15:50:28,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 15:50:28,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-09-14 15:50:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:50:28,811 INFO L225 Difference]: With dead ends: 18 [2018-09-14 15:50:28,812 INFO L226 Difference]: Without dead ends: 0 [2018-09-14 15:50:28,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-14 15:50:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-14 15:50:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-14 15:50:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-14 15:50:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-14 15:50:28,814 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-09-14 15:50:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:50:28,814 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-14 15:50:28,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 15:50:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-14 15:50:28,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-14 15:50:28,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-14 15:50:28,880 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-09-14 15:50:28,881 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-09-14 15:50:28,881 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-09-14 15:50:28,881 INFO L429 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-09-14 15:50:28,881 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-09-14 15:50:28,881 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-09-14 15:50:28,881 INFO L429 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-09-14 15:50:28,882 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-09-14 15:50:28,882 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-09-14 15:50:28,882 INFO L426 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-09-14 15:50:28,882 INFO L422 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)) [2018-09-14 15:50:28,882 INFO L422 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))) [2018-09-14 15:50:28,883 INFO L426 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-09-14 15:50:28,883 INFO L429 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-09-14 15:50:28,883 INFO L426 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-09-14 15:50:28,883 INFO L426 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-09-14 15:50:28,883 INFO L426 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-09-14 15:50:28,884 INFO L426 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-09-14 15:50:28,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 03:50:28 BoogieIcfgContainer [2018-09-14 15:50:28,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 15:50:28,897 INFO L168 Benchmark]: Toolchain (without parser) took 4030.18 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -638.6 MB). Peak memory consumption was 120.1 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:28,899 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-09-14 15:50:28,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.80 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. [2018-09-14 15:50:28,901 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.41 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. [2018-09-14 15:50:28,901 INFO L168 Benchmark]: Boogie Preprocessor took 17.16 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. [2018-09-14 15:50:28,902 INFO L168 Benchmark]: RCFGBuilder took 271.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:28,903 INFO L168 Benchmark]: TraceAbstraction took 3434.59 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: 162.7 MB). Peak memory consumption was 162.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:28,908 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.80 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 16.41 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 17.16 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 271.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3434.59 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: 162.7 MB). Peak memory consumption was 162.7 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, 3.3s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 2 SDslu, 81 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.1s 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, 0.0s AbstIntTime, 0 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, 2.4s 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! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/underapprox_true-unreach-call2_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_15-50-28-923.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/underapprox_true-unreach-call2_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_15-50-28-923.csv Received shutdown request...