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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 22:07:20,622 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 22:07:20,625 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 22:07:20,637 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 22:07:20,637 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 22:07:20,638 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 22:07:20,640 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 22:07:20,642 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 22:07:20,645 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 22:07:20,646 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 22:07:20,650 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 22:07:20,650 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 22:07:20,651 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 22:07:20,652 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 22:07:20,659 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 22:07:20,660 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 22:07:20,661 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 22:07:20,665 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 22:07:20,670 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 22:07:20,672 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 22:07:20,673 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 22:07:20,674 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 22:07:20,680 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 22:07:20,680 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 22:07:20,680 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 22:07:20,683 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 22:07:20,685 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 22:07:20,686 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 22:07:20,686 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 22:07:20,689 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 22:07:20,689 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 22:07:20,691 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 22:07:20,694 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 22:07:20,726 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 22:07:20,726 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 22:07:20,727 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 22:07:20,727 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 22:07:20,728 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 22:07:20,728 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 22:07:20,728 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 22:07:20,728 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 22:07:20,728 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 22:07:20,728 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 22:07:20,729 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 22:07:20,729 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 22:07:20,729 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 22:07:20,730 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 22:07:20,731 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 22:07:20,731 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 22:07:20,731 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 22:07:20,731 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 22:07:20,731 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 22:07:20,731 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 22:07:20,732 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 22:07:20,732 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 22:07:20,732 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 22:07:20,732 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 22:07:20,732 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 22:07:20,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 22:07:20,735 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 22:07:20,735 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 22:07:20,735 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 22:07:20,735 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 22:07:20,735 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 22:07:20,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 22:07:20,736 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 22:07:20,736 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 22:07:20,736 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 22:07:20,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 22:07:20,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 22:07:20,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 22:07:20,814 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 22:07:20,815 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 22:07:20,816 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-11-07 22:07:20,884 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f29586fec/f5f3d9bcae304726bed9bf405c38b369/FLAG6edb212e3 [2018-11-07 22:07:21,292 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 22:07:21,292 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-11-07 22:07:21,298 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f29586fec/f5f3d9bcae304726bed9bf405c38b369/FLAG6edb212e3 [2018-11-07 22:07:21,313 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f29586fec/f5f3d9bcae304726bed9bf405c38b369 [2018-11-07 22:07:21,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 22:07:21,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 22:07:21,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 22:07:21,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 22:07:21,333 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 22:07:21,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5979188f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21, skipping insertion in model container [2018-11-07 22:07:21,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 22:07:21,371 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 22:07:21,592 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 22:07:21,596 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 22:07:21,616 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 22:07:21,633 INFO L193 MainTranslator]: Completed translation [2018-11-07 22:07:21,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21 WrapperNode [2018-11-07 22:07:21,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 22:07:21,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 22:07:21,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 22:07:21,635 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 22:07:21,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 22:07:21,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 22:07:21,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 22:07:21,654 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 22:07:21,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (1/1) ... [2018-11-07 22:07:21,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 22:07:21,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 22:07:21,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 22:07:21,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 22:07:21,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (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 [2018-11-07 22:07:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 22:07:21,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 22:07:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 22:07:21,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 22:07:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 22:07:21,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 22:07:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 22:07:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 22:07:22,021 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 22:07:22,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:07:22 BoogieIcfgContainer [2018-11-07 22:07:22,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 22:07:22,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 22:07:22,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 22:07:22,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 22:07:22,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 10:07:21" (1/3) ... [2018-11-07 22:07:22,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604e7067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:07:22, skipping insertion in model container [2018-11-07 22:07:22,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:07:21" (2/3) ... [2018-11-07 22:07:22,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604e7067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:07:22, skipping insertion in model container [2018-11-07 22:07:22,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:07:22" (3/3) ... [2018-11-07 22:07:22,032 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-11-07 22:07:22,043 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 22:07:22,053 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 22:07:22,067 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 22:07:22,100 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 22:07:22,100 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 22:07:22,100 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 22:07:22,100 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 22:07:22,100 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 22:07:22,101 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 22:07:22,101 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 22:07:22,101 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 22:07:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-07 22:07:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-07 22:07:22,125 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:07:22,126 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:07:22,129 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:07:22,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:07:22,135 INFO L82 PathProgramCache]: Analyzing trace with hash -283544510, now seen corresponding path program 1 times [2018-11-07 22:07:22,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:07:22,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:07:22,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,186 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:07:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:07:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:07:22,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:07:22,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 22:07:22,246 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:07:22,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 22:07:22,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 22:07:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 22:07:22,264 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-07 22:07:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:07:22,285 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2018-11-07 22:07:22,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 22:07:22,286 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-07 22:07:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:07:22,295 INFO L225 Difference]: With dead ends: 37 [2018-11-07 22:07:22,295 INFO L226 Difference]: Without dead ends: 15 [2018-11-07 22:07:22,299 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 [2018-11-07 22:07:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-07 22:07:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-07 22:07:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-07 22:07:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-07 22:07:22,338 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-11-07 22:07:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:07:22,339 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-07 22:07:22,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 22:07:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-07 22:07:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-07 22:07:22,340 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:07:22,340 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:07:22,341 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:07:22,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:07:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash -863512858, now seen corresponding path program 1 times [2018-11-07 22:07:22,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:07:22,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:07:22,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,343 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:07:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:07:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:07:22,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:07:22,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 22:07:22,524 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:07:22,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 22:07:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 22:07:22,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 22:07:22,526 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2018-11-07 22:07:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:07:22,593 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-07 22:07:22,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 22:07:22,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-07 22:07:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:07:22,595 INFO L225 Difference]: With dead ends: 25 [2018-11-07 22:07:22,596 INFO L226 Difference]: Without dead ends: 20 [2018-11-07 22:07:22,597 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 [2018-11-07 22:07:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-07 22:07:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-11-07 22:07:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-07 22:07:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-07 22:07:22,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-11-07 22:07:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:07:22,604 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-07 22:07:22,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 22:07:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-07 22:07:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-07 22:07:22,605 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:07:22,605 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:07:22,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:07:22,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:07:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1427803270, now seen corresponding path program 1 times [2018-11-07 22:07:22,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:07:22,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:07:22,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:07:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:07:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:07:22,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:07:22,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 22:07:22,787 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:07:22,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 22:07:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 22:07:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 22:07:22,792 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2018-11-07 22:07:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:07:22,827 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-07 22:07:22,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 22:07:22,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-11-07 22:07:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:07:22,830 INFO L225 Difference]: With dead ends: 29 [2018-11-07 22:07:22,830 INFO L226 Difference]: Without dead ends: 19 [2018-11-07 22:07:22,831 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 22:07:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-07 22:07:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-07 22:07:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-07 22:07:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-07 22:07:22,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-11-07 22:07:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:07:22,842 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-07 22:07:22,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 22:07:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-07 22:07:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-07 22:07:22,844 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:07:22,844 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:07:22,845 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:07:22,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:07:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1523179828, now seen corresponding path program 1 times [2018-11-07 22:07:22,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:07:22,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:07:22,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:22,847 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:07:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:07:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:07:23,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:07:23,019 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:07:23,020 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-07 22:07:23,022 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [22], [24], [28], [34], [37], [39], [45], [46], [47], [49] [2018-11-07 22:07:23,052 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 22:07:23,053 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 22:07:23,151 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 22:07:23,376 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 22:07:23,379 INFO L272 AbstractInterpreter]: Visited 16 different actions 113 times. Merged at 7 different actions 60 times. Widened at 3 different actions 13 times. Found 14 fixpoints after 4 different actions. Largest state had 4 variables. [2018-11-07 22:07:23,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:07:23,395 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 22:07:23,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:07:23,395 INFO L194 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 [2018-11-07 22:07:23,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:07:23,406 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 22:07:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:07:23,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:07:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:07:23,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:07:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 22:07:23,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:07:23,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2018-11-07 22:07:23,758 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:07:23,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 22:07:23,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 22:07:23,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-07 22:07:23,765 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2018-11-07 22:07:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:07:24,034 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2018-11-07 22:07:24,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 22:07:24,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-11-07 22:07:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:07:24,037 INFO L225 Difference]: With dead ends: 49 [2018-11-07 22:07:24,037 INFO L226 Difference]: Without dead ends: 37 [2018-11-07 22:07:24,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-11-07 22:07:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-07 22:07:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-11-07 22:07:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-07 22:07:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-11-07 22:07:24,046 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2018-11-07 22:07:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:07:24,046 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-11-07 22:07:24,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 22:07:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-11-07 22:07:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-07 22:07:24,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:07:24,048 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:07:24,048 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:07:24,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:07:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1070919706, now seen corresponding path program 2 times [2018-11-07 22:07:24,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:07:24,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:24,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:07:24,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:07:24,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:07:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:07:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 22:07:24,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:07:24,156 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:07:24,156 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 22:07:24,156 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 22:07:24,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:07:24,156 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 22:07:24,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 22:07:24,172 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 22:07:24,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-07 22:07:24,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 22:07:24,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:07:32,805 WARN L179 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-11-07 22:07:34,825 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 Int)) (let ((.cse0 (mod v_prenex_2 2)) (.cse1 (mod v_prenex_2 4294967296))) (and (= .cse0 c___VERIFIER_assert_~cond) (<= 0 .cse1) (< (mod (+ v_prenex_2 4294967295) 4294967296) 268435455) (<= .cse0 2147483647) (<= 268435455 .cse1)))) is different from true [2018-11-07 22:07:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-07 22:07:36,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:07:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-07 22:07:41,193 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 22:07:41,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 15 [2018-11-07 22:07:41,194 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:07:41,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 22:07:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 22:07:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=4, NotChecked=24, Total=210 [2018-11-07 22:07:41,201 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2018-11-07 22:07:45,785 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 22:07:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:07:45,786 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-11-07 22:07:45,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 22:07:45,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-11-07 22:07:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:07:45,787 INFO L225 Difference]: With dead ends: 30 [2018-11-07 22:07:45,788 INFO L226 Difference]: Without dead ends: 0 [2018-11-07 22:07:45,789 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=44, Invalid=195, Unknown=5, NotChecked=28, Total=272 [2018-11-07 22:07:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-07 22:07:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-07 22:07:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-07 22:07:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-07 22:07:45,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-11-07 22:07:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:07:45,790 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-07 22:07:45,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 22:07:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-07 22:07:45,791 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-07 22:07:45,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-07 22:07:45,959 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-07 22:07:45,959 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-07 22:07:45,959 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-07 22:07:45,959 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-07 22:07:45,960 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-07 22:07:45,960 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-07 22:07:45,960 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 19) no Hoare annotation was computed. [2018-11-07 22:07:45,960 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 19) no Hoare annotation was computed. [2018-11-07 22:07:45,960 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2018-11-07 22:07:45,960 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 17) no Hoare annotation was computed. [2018-11-07 22:07:45,961 INFO L421 ceAbstractionStarter]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (= main_~x~0 0) (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (< (mod main_~x~0 4294967296) 268435455))) [2018-11-07 22:07:45,961 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2018-11-07 22:07:45,961 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 17) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (and (<= 0 main_~y~0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0))) [2018-11-07 22:07:45,961 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 17) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (<= 268435455 (mod main_~x~0 4294967296))) [2018-11-07 22:07:45,961 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 19) the Hoare annotation is: true [2018-11-07 22:07:45,962 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-11-07 22:07:45,962 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-11-07 22:07:45,962 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-11-07 22:07:45,962 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-11-07 22:07:45,962 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-11-07 22:07:45,962 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-11-07 22:07:45,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 10:07:45 BoogieIcfgContainer [2018-11-07 22:07:45,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 22:07:45,977 INFO L168 Benchmark]: Toolchain (without parser) took 24650.47 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -599.8 MB). Peak memory consumption was 129.5 MB. Max. memory is 7.1 GB. [2018-11-07 22:07:45,979 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-11-07 22:07:45,979 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.65 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. [2018-11-07 22:07:45,980 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.40 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. [2018-11-07 22:07:45,981 INFO L168 Benchmark]: Boogie Preprocessor took 21.28 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. [2018-11-07 22:07:45,981 INFO L168 Benchmark]: RCFGBuilder took 346.95 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -771.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2018-11-07 22:07:45,983 INFO L168 Benchmark]: TraceAbstraction took 23952.26 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 160.9 MB). Peak memory consumption was 160.9 MB. Max. memory is 7.1 GB. [2018-11-07 22:07:45,987 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.65 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 18.40 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 21.28 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 346.95 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -771.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23952.26 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 160.9 MB). Peak memory consumption was 160.9 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 + 4294967295) % 4294967296 < 268435455 || (((0 <= y && x <= 0) && 0 <= x) && y <= 0) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x == 0 || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 23.8s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 5.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 83 SDtfs, 21 SDslu, 105 SDs, 0 SdLazy, 66 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 19.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 12 PreInvPairs, 22 NumberOfFragments, 56 HoareAnnotationTreeSize, 12 FomulaSimplifications, 106 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 131 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 169 ConstructedInterpolants, 2 QuantifiedInterpolants, 13521 SizeOfPredicates, 5 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 111/125 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...