java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 10:06:29,636 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 10:06:29,641 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 10:06:29,655 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 10:06:29,656 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 10:06:29,657 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 10:06:29,658 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 10:06:29,660 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 10:06:29,661 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 10:06:29,662 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 10:06:29,663 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 10:06:29,664 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 10:06:29,664 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 10:06:29,666 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 10:06:29,667 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 10:06:29,667 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 10:06:29,668 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 10:06:29,670 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 10:06:29,672 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 10:06:29,676 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 10:06:29,677 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 10:06:29,680 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 10:06:29,686 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 10:06:29,700 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 10:06:29,727 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 10:06:29,728 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 10:06:29,728 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 10:06:29,729 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 10:06:29,730 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 10:06:29,730 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 10:06:29,730 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 10:06:29,730 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 10:06:29,730 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 10:06:29,731 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 10:06:29,731 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 10:06:29,731 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 10:06:29,732 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 10:06:29,732 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 10:06:29,732 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 10:06:29,732 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 10:06:29,734 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 10:06:29,734 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 10:06:29,734 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 10:06:29,734 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 10:06:29,734 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 10:06:29,735 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 10:06:29,735 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 10:06:29,735 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 10:06:29,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 10:06:29,735 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 10:06:29,735 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 10:06:29,736 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 10:06:29,736 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 10:06:29,736 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 10:06:29,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 10:06:29,737 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 10:06:29,737 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 10:06:29,737 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 10:06:29,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 10:06:29,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 10:06:29,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 10:06:29,812 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 10:06:29,812 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 10:06:29,813 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-23 10:06:29,873 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9dd97acb6/6ff8a8819ee543c48263ee4ab870531d/FLAG4ccf9f8e5 [2018-10-23 10:06:30,371 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 10:06:30,373 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-23 10:06:30,381 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9dd97acb6/6ff8a8819ee543c48263ee4ab870531d/FLAG4ccf9f8e5 [2018-10-23 10:06:30,400 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9dd97acb6/6ff8a8819ee543c48263ee4ab870531d [2018-10-23 10:06:30,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 10:06:30,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 10:06:30,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 10:06:30,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 10:06:30,418 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 10:06:30,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab32887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30, skipping insertion in model container [2018-10-23 10:06:30,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 10:06:30,451 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 10:06:30,667 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:06:30,672 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 10:06:30,693 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:06:30,711 INFO L193 MainTranslator]: Completed translation [2018-10-23 10:06:30,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30 WrapperNode [2018-10-23 10:06:30,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 10:06:30,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 10:06:30,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 10:06:30,713 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 10:06:30,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 10:06:30,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 10:06:30,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 10:06:30,737 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 10:06:30,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... [2018-10-23 10:06:30,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 10:06:30,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 10:06:30,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 10:06:30,764 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 10:06:30,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 10:06:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 10:06:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 10:06:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 10:06:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 10:06:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 10:06:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 10:06:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-23 10:06:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-23 10:06:31,175 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 10:06:31,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:06:31 BoogieIcfgContainer [2018-10-23 10:06:31,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 10:06:31,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 10:06:31,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 10:06:31,181 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 10:06:31,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:06:30" (1/3) ... [2018-10-23 10:06:31,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f1b455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:06:31, skipping insertion in model container [2018-10-23 10:06:31,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:30" (2/3) ... [2018-10-23 10:06:31,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f1b455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:06:31, skipping insertion in model container [2018-10-23 10:06:31,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:06:31" (3/3) ... [2018-10-23 10:06:31,185 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call_true-termination.i [2018-10-23 10:06:31,202 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 10:06:31,222 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 10:06:31,270 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 10:06:31,327 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 10:06:31,327 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 10:06:31,327 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 10:06:31,327 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 10:06:31,328 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 10:06:31,328 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 10:06:31,328 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 10:06:31,328 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 10:06:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-23 10:06:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-23 10:06:31,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:06:31,354 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:06:31,356 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:06:31,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:06:31,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1152414567, now seen corresponding path program 1 times [2018-10-23 10:06:31,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:06:31,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:31,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:31,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:31,421 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:06:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:31,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:06:31,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 10:06:31,496 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:06:31,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 10:06:31,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 10:06:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 10:06:31,515 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-23 10:06:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:06:31,538 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-23 10:06:31,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 10:06:31,540 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-23 10:06:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:06:31,548 INFO L225 Difference]: With dead ends: 33 [2018-10-23 10:06:31,549 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 10:06:31,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 10:06:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 10:06:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 10:06:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 10:06:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 10:06:31,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-23 10:06:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:06:31,594 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 10:06:31,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 10:06:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 10:06:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-23 10:06:31,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:06:31,595 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:06:31,596 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:06:31,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:06:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1083883255, now seen corresponding path program 1 times [2018-10-23 10:06:31,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:06:31,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:31,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:31,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:31,598 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:06:31,606 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 10:06:31,606 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 10:06:31,607 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 10:06:31,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:31,623 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-23 10:06:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:31,670 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-10-23 10:06:31,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:06:31,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:06:31,671 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:06:31,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:31,683 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:06:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:31,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:06:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:31,755 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:06:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:31,832 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:06:31,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-10-23 10:06:31,832 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:06:31,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 10:06:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 10:06:31,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 10:06:31,834 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2018-10-23 10:06:31,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:06:31,890 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-23 10:06:31,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 10:06:31,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-23 10:06:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:06:31,892 INFO L225 Difference]: With dead ends: 22 [2018-10-23 10:06:31,892 INFO L226 Difference]: Without dead ends: 17 [2018-10-23 10:06:31,893 INFO L605 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 [2018-10-23 10:06:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-23 10:06:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-10-23 10:06:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-23 10:06:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-23 10:06:31,899 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-10-23 10:06:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:06:31,899 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-23 10:06:31,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 10:06:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-23 10:06:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-23 10:06:31,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:06:31,900 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:06:31,901 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:06:31,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:06:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1128913667, now seen corresponding path program 1 times [2018-10-23 10:06:31,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:06:31,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:31,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:31,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:31,903 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:06:31,913 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 10:06:31,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 10:06:31,914 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 10:06:31,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:31,932 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-23 10:06:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:31,967 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-23 10:06:31,969 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [19], [26], [29], [31], [37], [38], [39], [41] [2018-10-23 10:06:32,015 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 10:06:32,015 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 10:06:32,431 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 10:06:32,433 INFO L272 AbstractInterpreter]: Visited 14 different actions 96 times. Merged at 4 different actions 43 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-23 10:06:32,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:06:32,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 10:06:32,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:06:32,480 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 10:06:32,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:32,489 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:06:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:32,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:06:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:32,987 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:06:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:33,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 10:06:33,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-23 10:06:33,375 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:06:33,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 10:06:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 10:06:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-10-23 10:06:33,377 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2018-10-23 10:06:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:06:33,560 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-23 10:06:33,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 10:06:33,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-10-23 10:06:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:06:33,561 INFO L225 Difference]: With dead ends: 24 [2018-10-23 10:06:33,561 INFO L226 Difference]: Without dead ends: 19 [2018-10-23 10:06:33,563 INFO L605 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 [2018-10-23 10:06:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-23 10:06:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-23 10:06:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-23 10:06:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-23 10:06:33,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2018-10-23 10:06:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:06:33,569 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-23 10:06:33,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 10:06:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-23 10:06:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-23 10:06:33,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:06:33,570 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:06:33,570 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:06:33,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:06:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1694846089, now seen corresponding path program 2 times [2018-10-23 10:06:33,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:06:33,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:33,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:06:33,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:33,572 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:06:33,579 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 10:06:33,580 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 10:06:33,580 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-23 10:06:33,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:06:33,591 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-23 10:06:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:33,623 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:06:33,623 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:06:33,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:06:33,623 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 10:06:33,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:06:33,632 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:06:33,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:06:33,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:06:33,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:06:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:34,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:06:34,300 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 [2018-10-23 10:06:34,341 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 [2018-10-23 10:06:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2018-10-23 10:06:34,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 10:06:34,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-23 10:06:34,451 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:06:34,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 10:06:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 10:06:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=199, Unknown=2, NotChecked=58, Total=306 [2018-10-23 10:06:34,453 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-23 10:06:35,134 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 [2018-10-23 10:06:35,265 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 [2018-10-23 10:06:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:06:35,382 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-23 10:06:35,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 10:06:35,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-23 10:06:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:06:35,385 INFO L225 Difference]: With dead ends: 34 [2018-10-23 10:06:35,385 INFO L226 Difference]: Without dead ends: 28 [2018-10-23 10:06:35,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=388, Unknown=4, NotChecked=172, Total=650 [2018-10-23 10:06:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-23 10:06:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-23 10:06:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-23 10:06:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-23 10:06:35,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2018-10-23 10:06:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:06:35,394 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-23 10:06:35,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 10:06:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-23 10:06:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-23 10:06:35,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:06:35,396 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:06:35,396 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:06:35,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:06:35,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1287303683, now seen corresponding path program 3 times [2018-10-23 10:06:35,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:06:35,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:35,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:06:35,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:06:35,398 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:06:35,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-23 10:06:35,409 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-23 10:06:35,409 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 10:06:35,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:06:35,423 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-23 10:06:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:06:35,454 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:06:35,454 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:06:35,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:06:35,455 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 10:06:35,462 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:06:35,462 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:06:35,510 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:06:35,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:06:35,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:06:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:06:35,784 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:06:35,949 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 [2018-10-23 10:06:36,293 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 [2018-10-23 10:06:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 16 not checked. [2018-10-23 10:06:37,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 10:06:37,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2018-10-23 10:06:37,393 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:06:37,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 10:06:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 10:06:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=441, Unknown=4, NotChecked=86, Total=600 [2018-10-23 10:06:37,396 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2018-10-23 10:06:41,125 WARN L179 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-10-23 10:06:41,264 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 [2018-10-23 10:06:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:06:41,393 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-10-23 10:06:41,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 10:06:41,394 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2018-10-23 10:06:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:06:41,395 INFO L225 Difference]: With dead ends: 32 [2018-10-23 10:06:41,395 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 10:06:41,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=150, Invalid=1117, Unknown=5, NotChecked=210, Total=1482 [2018-10-23 10:06:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 10:06:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 10:06:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 10:06:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 10:06:41,398 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-10-23 10:06:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:06:41,398 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 10:06:41,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 10:06:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 10:06:41,398 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 10:06:41,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 10:06:43,768 WARN L179 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2018-10-23 10:06:43,803 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-23 10:06:43,803 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-23 10:06:43,803 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-23 10:06:43,804 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-23 10:06:43,804 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-23 10:06:43,804 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-23 10:06:43,804 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-10-23 10:06:43,804 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-10-23 10:06:43,804 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-23 10:06:43,804 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2018-10-23 10:06:43,804 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-23 10:06:43,804 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-10-23 10:06:43,805 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2018-10-23 10:06:43,805 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)))) [2018-10-23 10:06:43,805 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)) [2018-10-23 10:06:43,805 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-23 10:06:43,805 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-23 10:06:43,805 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-23 10:06:43,806 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-23 10:06:43,806 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-23 10:06:43,806 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-23 10:06:43,811 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,812 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,812 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,812 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,818 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,818 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,818 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,819 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:06:43 BoogieIcfgContainer [2018-10-23 10:06:43,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 10:06:43,822 INFO L168 Benchmark]: Toolchain (without parser) took 13409.84 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 731.4 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -323.6 MB). Peak memory consumption was 407.8 MB. Max. memory is 7.1 GB. [2018-10-23 10:06:43,824 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:06:43,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 10:06:43,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:06:43,826 INFO L168 Benchmark]: Boogie Preprocessor took 25.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:06:43,826 INFO L168 Benchmark]: RCFGBuilder took 413.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 731.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-23 10:06:43,827 INFO L168 Benchmark]: TraceAbstraction took 12643.69 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 447.1 MB). Peak memory consumption was 447.1 MB. Max. memory is 7.1 GB. [2018-10-23 10:06:43,832 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.30 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 24.02 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 25.83 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 413.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 731.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12643.69 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 447.1 MB). Peak memory consumption was 447.1 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 [2018-10-23 10:06:43,841 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,842 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,842 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,842 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,843 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,843 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,843 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-23 10:06:43,843 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, 12.4s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 5.2s AutomataDifference, 0.0s DeadEndRemovalTime, 2.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 12 SDslu, 315 SDs, 0 SdLazy, 328 SolverSat, 27 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 7.5s 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, 0.5s 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, 325 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 146 ConstructedInterpolants, 19 QuantifiedInterpolants, 22457 SizeOfPredicates, 15 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 14/98 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...