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-new/gauss_sum_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 20:42:12,674 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 20:42:12,676 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 20:42:12,689 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 20:42:12,690 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 20:42:12,691 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 20:42:12,692 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 20:42:12,694 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 20:42:12,695 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 20:42:12,696 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 20:42:12,697 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 20:42:12,697 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 20:42:12,698 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 20:42:12,699 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 20:42:12,700 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 20:42:12,701 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 20:42:12,702 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 20:42:12,704 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 20:42:12,706 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 20:42:12,708 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 20:42:12,709 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 20:42:12,710 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 20:42:12,713 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 20:42:12,713 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 20:42:12,713 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 20:42:12,714 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 20:42:12,715 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 20:42:12,716 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 20:42:12,717 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 20:42:12,718 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 20:42:12,718 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 20:42:12,719 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 20:42:12,723 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 [2018-11-12 20:42:12,753 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 20:42:12,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 20:42:12,757 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 20:42:12,757 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 20:42:12,757 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 20:42:12,758 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 20:42:12,758 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 20:42:12,758 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 20:42:12,758 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 20:42:12,758 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 20:42:12,759 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 20:42:12,759 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 20:42:12,759 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 20:42:12,761 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 20:42:12,762 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 20:42:12,762 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 20:42:12,762 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 20:42:12,762 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 20:42:12,763 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 20:42:12,764 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 20:42:12,765 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 20:42:12,765 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 20:42:12,765 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 20:42:12,765 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 20:42:12,765 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 20:42:12,766 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 20:42:12,766 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 20:42:12,766 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 20:42:12,766 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 20:42:12,767 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 20:42:12,767 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 20:42:12,767 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 20:42:12,767 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 20:42:12,768 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 20:42:12,768 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 20:42:12,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 20:42:12,844 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 20:42:12,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 20:42:12,850 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 20:42:12,851 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 20:42:12,852 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-11-12 20:42:12,918 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13ba501d/6c3053a044e94055bb84040beedc10c0/FLAG04018e623 [2018-11-12 20:42:13,373 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 20:42:13,374 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-11-12 20:42:13,381 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13ba501d/6c3053a044e94055bb84040beedc10c0/FLAG04018e623 [2018-11-12 20:42:13,400 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13ba501d/6c3053a044e94055bb84040beedc10c0 [2018-11-12 20:42:13,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 20:42:13,415 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 20:42:13,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 20:42:13,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 20:42:13,421 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 20:42:13,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cda1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13, skipping insertion in model container [2018-11-12 20:42:13,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 20:42:13,466 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 20:42:13,642 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 20:42:13,645 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 20:42:13,661 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 20:42:13,676 INFO L193 MainTranslator]: Completed translation [2018-11-12 20:42:13,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13 WrapperNode [2018-11-12 20:42:13,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 20:42:13,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 20:42:13,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 20:42:13,677 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 20:42:13,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 20:42:13,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 20:42:13,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 20:42:13,700 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 20:42:13,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (1/1) ... [2018-11-12 20:42:13,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 20:42:13,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 20:42:13,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 20:42:13,724 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 20:42:13,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (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 [2018-11-12 20:42:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 20:42:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 20:42:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 20:42:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 20:42:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 20:42:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 20:42:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-12 20:42:13,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-12 20:42:14,256 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 20:42:14,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:42:14 BoogieIcfgContainer [2018-11-12 20:42:14,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 20:42:14,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 20:42:14,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 20:42:14,262 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 20:42:14,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:42:13" (1/3) ... [2018-11-12 20:42:14,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7455946c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:42:14, skipping insertion in model container [2018-11-12 20:42:14,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:42:13" (2/3) ... [2018-11-12 20:42:14,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7455946c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:42:14, skipping insertion in model container [2018-11-12 20:42:14,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:42:14" (3/3) ... [2018-11-12 20:42:14,266 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call_true-termination.i [2018-11-12 20:42:14,284 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 20:42:14,295 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 20:42:14,320 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 20:42:14,397 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 20:42:14,397 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 20:42:14,397 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 20:42:14,397 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 20:42:14,397 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 20:42:14,398 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 20:42:14,398 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 20:42:14,398 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 20:42:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-12 20:42:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-12 20:42:14,446 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:42:14,447 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:42:14,450 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:42:14,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:42:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1152414567, now seen corresponding path program 1 times [2018-11-12 20:42:14,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:42:14,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:14,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:14,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:14,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:42:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:14,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 20:42:14,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-12 20:42:14,581 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 20:42:14,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-12 20:42:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-12 20:42:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-12 20:42:14,602 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-12 20:42:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:42:14,628 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-12 20:42:14,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-12 20:42:14,629 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-12 20:42:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:42:14,639 INFO L225 Difference]: With dead ends: 33 [2018-11-12 20:42:14,639 INFO L226 Difference]: Without dead ends: 14 [2018-11-12 20:42:14,643 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 [2018-11-12 20:42:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-12 20:42:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-12 20:42:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-12 20:42:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-12 20:42:14,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-12 20:42:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:42:14,683 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-12 20:42:14,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-12 20:42:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-12 20:42:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-12 20:42:14,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:42:14,684 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:42:14,684 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:42:14,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:42:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1083883255, now seen corresponding path program 1 times [2018-11-12 20:42:14,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:42:14,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:14,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:14,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:14,687 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:42:14,694 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-12 20:42:14,694 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-12 20:42:14,694 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-12 20:42:14,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:14,712 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-12 20:42:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:14,754 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-11-12 20:42:14,755 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:42:14,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:42:14,756 INFO L192 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 [2018-11-12 20:42:14,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:14,767 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 20:42:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:14,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:42:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:14,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:42:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:14,927 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-12 20:42:14,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-11-12 20:42:14,927 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 20:42:14,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 20:42:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 20:42:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 20:42:14,929 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2018-11-12 20:42:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:42:14,979 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-12 20:42:14,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 20:42:14,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-12 20:42:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:42:14,981 INFO L225 Difference]: With dead ends: 22 [2018-11-12 20:42:14,981 INFO L226 Difference]: Without dead ends: 17 [2018-11-12 20:42:14,982 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 20:42:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-12 20:42:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-11-12 20:42:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-12 20:42:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-12 20:42:14,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-11-12 20:42:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:42:14,993 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-12 20:42:14,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 20:42:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-12 20:42:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-12 20:42:14,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:42:14,995 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:42:14,995 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:42:14,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:42:14,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1128913667, now seen corresponding path program 1 times [2018-11-12 20:42:14,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:42:15,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:15,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:15,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:15,001 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:42:15,017 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-12 20:42:15,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-12 20:42:15,019 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-12 20:42:15,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:15,039 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-12 20:42:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:15,078 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-12 20:42:15,080 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [19], [26], [29], [31], [37], [38], [39], [41] [2018-11-12 20:42:15,111 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 20:42:15,111 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 20:42:15,399 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 20:42:15,400 INFO L272 AbstractInterpreter]: Visited 14 different actions 66 times. Merged at 4 different actions 27 times. Widened at 1 different actions 3 times. Performed 166 root evaluator evaluations with a maximum evaluation depth of 6. Performed 166 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-11-12 20:42:15,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:42:15,415 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 20:42:15,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:42:15,415 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 20:42:15,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:15,426 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 20:42:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:15,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:42:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:15,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:42:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:16,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-12 20:42:16,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-11-12 20:42:16,233 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:42:16,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-12 20:42:16,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-12 20:42:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-12 20:42:16,235 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2018-11-12 20:42:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:42:16,522 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-12 20:42:16,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 20:42:16,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-11-12 20:42:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:42:16,524 INFO L225 Difference]: With dead ends: 24 [2018-11-12 20:42:16,524 INFO L226 Difference]: Without dead ends: 19 [2018-11-12 20:42:16,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-12 20:42:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-12 20:42:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-12 20:42:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-12 20:42:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-12 20:42:16,530 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2018-11-12 20:42:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:42:16,530 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-12 20:42:16,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-12 20:42:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-12 20:42:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-12 20:42:16,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:42:16,532 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:42:16,532 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:42:16,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:42:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1694846089, now seen corresponding path program 2 times [2018-11-12 20:42:16,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:42:16,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:16,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:42:16,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:16,534 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:42:16,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-12 20:42:16,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-12 20:42:16,542 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-12 20:42:16,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 20:42:16,559 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-12 20:42:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:16,587 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 20:42:16,587 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:42:16,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:42:16,587 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 20:42:16,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 20:42:16,596 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 20:42:16,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-12 20:42:16,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 20:42:16,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:42:16,939 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-12 20:42:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:17,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:42:17,271 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) is different from true [2018-11-12 20:42:17,307 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2018-11-12 20:42:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2018-11-12 20:42:19,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-12 20:42:19,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-11-12 20:42:19,401 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:42:19,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 20:42:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 20:42:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=198, Unknown=3, NotChecked=58, Total=306 [2018-11-12 20:42:19,404 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-11-12 20:42:19,711 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-11-12 20:42:20,015 WARN L854 $PredicateComparison]: unable to prove that (and (or (< c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0))) (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0))))) is different from true [2018-11-12 20:42:20,155 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2018-11-12 20:42:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:42:20,235 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-12 20:42:20,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-12 20:42:20,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-11-12 20:42:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:42:20,237 INFO L225 Difference]: With dead ends: 34 [2018-11-12 20:42:20,238 INFO L226 Difference]: Without dead ends: 28 [2018-11-12 20:42:20,239 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=86, Invalid=387, Unknown=5, NotChecked=172, Total=650 [2018-11-12 20:42:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-12 20:42:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-12 20:42:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-12 20:42:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-12 20:42:20,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2018-11-12 20:42:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:42:20,248 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-12 20:42:20,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 20:42:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-12 20:42:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-12 20:42:20,249 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:42:20,249 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:42:20,250 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:42:20,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:42:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1287303683, now seen corresponding path program 3 times [2018-11-12 20:42:20,250 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:42:20,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:20,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 20:42:20,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:42:20,252 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:42:20,263 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-12 20:42:20,263 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-12 20:42:20,263 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-12 20:42:20,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 20:42:20,276 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-12 20:42:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:42:20,304 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 20:42:20,304 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:42:20,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:42:20,304 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 20:42:20,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-12 20:42:20,313 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-12 20:42:20,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-12 20:42:20,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 20:42:20,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:42:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:42:20,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:42:20,841 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) is different from true [2018-11-12 20:42:20,857 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2018-11-12 20:42:21,628 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 2))) (or (= (+ (* 4 c_main_~i~0) (* 2 c_main_~sum~0) 6) (* (+ main_~n~0 1) main_~n~0)) (< .cse0 main_~n~0) (< main_~n~0 .cse0)))) is different from true [2018-11-12 20:42:21,895 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 2))) (or (= (+ (* 6 c_main_~i~0) (* 2 c_main_~sum~0) 6) (* (+ main_~n~0 1) main_~n~0)) (< .cse0 main_~n~0) (< main_~n~0 .cse0)))) is different from true [2018-11-12 20:42:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 25 not checked. [2018-11-12 20:42:21,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-12 20:42:21,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2018-11-12 20:42:21,940 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:42:21,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-12 20:42:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-12 20:42:21,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=408, Unknown=4, NotChecked=172, Total=650 [2018-11-12 20:42:21,942 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 26 states. [2018-11-12 20:42:25,658 WARN L179 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-11-12 20:42:25,805 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (< main_~n~0 .cse0) (= (+ (* 4 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0))))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2018-11-12 20:42:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:42:25,927 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-11-12 20:42:25,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-12 20:42:25,927 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 27 [2018-11-12 20:42:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:42:25,928 INFO L225 Difference]: With dead ends: 32 [2018-11-12 20:42:25,928 INFO L226 Difference]: Without dead ends: 0 [2018-11-12 20:42:25,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=142, Invalid=1063, Unknown=5, NotChecked=350, Total=1560 [2018-11-12 20:42:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-12 20:42:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-12 20:42:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-12 20:42:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-12 20:42:25,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-11-12 20:42:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:42:25,930 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-12 20:42:25,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-12 20:42:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-12 20:42:25,931 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-12 20:42:25,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-12 20:42:26,233 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 21 [2018-11-12 20:42:26,267 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-12 20:42:26,268 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-12 20:42:26,268 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-12 20:42:26,268 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-12 20:42:26,268 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-12 20:42:26,268 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-12 20:42:26,268 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-11-12 20:42:26,269 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-11-12 20:42:26,269 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-11-12 20:42:26,269 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2018-11-12 20:42:26,269 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-12 20:42:26,269 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-11-12 20:42:26,269 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2018-11-12 20:42:26,269 INFO L421 ceAbstractionStarter]: At program point L15-4(lines 15 17) the Hoare annotation is: (and (forall ((main_~n~0 Int)) (let ((.cse0 (+ main_~i~0 1))) (or (< .cse0 main_~n~0) (< main_~n~0 .cse0) (= (+ (* 4 main_~i~0) (* 2 main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0))))) (or (<= main_~i~0 main_~n~0) (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)))) [2018-11-12 20:42:26,270 INFO L421 ceAbstractionStarter]: At program point L15-5(lines 15 17) the Hoare annotation is: (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)) [2018-11-12 20:42:26,270 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-12 20:42:26,270 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-12 20:42:26,270 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-12 20:42:26,270 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-12 20:42:26,270 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-12 20:42:26,270 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-12 20:42:26,276 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,277 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,277 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,277 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,284 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,284 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,284 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,285 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 08:42:26 BoogieIcfgContainer [2018-11-12 20:42:26,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 20:42:26,288 INFO L168 Benchmark]: Toolchain (without parser) took 12873.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -341.5 MB). Peak memory consumption was 397.8 MB. Max. memory is 7.1 GB. [2018-11-12 20:42:26,289 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. [2018-11-12 20:42:26,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.40 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. [2018-11-12 20:42:26,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.22 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. [2018-11-12 20:42:26,292 INFO L168 Benchmark]: Boogie Preprocessor took 23.36 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. [2018-11-12 20:42:26,293 INFO L168 Benchmark]: RCFGBuilder took 533.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -778.5 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2018-11-12 20:42:26,294 INFO L168 Benchmark]: TraceAbstraction took 12028.96 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 426.5 MB). Peak memory consumption was 426.5 MB. Max. memory is 7.1 GB. [2018-11-12 20:42:26,298 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 260.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.36 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 533.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -778.5 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12028.96 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 426.5 MB). Peak memory consumption was 426.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant [2018-11-12 20:42:26,307 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,307 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,307 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,307 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,308 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,308 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,308 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-11-12 20:42:26,309 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: (forall main_~n~0 : int :: (i + 1 < main_~n~0 || main_~n~0 < i + 1) || 4 * i + 2 * sum + 2 == (main_~n~0 + 1) * main_~n~0) && (i <= n || 2 * sum == (n + 1) * n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 11.9s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 5.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 12 SDslu, 337 SDs, 0 SdLazy, 346 SolverSat, 28 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 23 NumberOfFragments, 54 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 351 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 146 ConstructedInterpolants, 19 QuantifiedInterpolants, 22457 SizeOfPredicates, 15 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 9/98 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...