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/loops/sum01_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:59:45,141 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:59:45,143 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:59:45,155 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:59:45,156 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:59:45,157 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:59:45,158 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:59:45,160 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:59:45,161 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:59:45,162 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:59:45,163 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:59:45,163 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:59:45,164 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:59:45,165 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:59:45,167 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:59:45,168 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:59:45,169 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:59:45,172 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:59:45,177 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:59:45,182 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:59:45,184 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:59:45,188 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:59:45,192 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:59:45,207 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 [2018-10-22 15:59:45,236 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:59:45,236 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:59:45,237 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:59:45,238 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:59:45,238 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:59:45,238 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:59:45,238 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:59:45,238 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:59:45,239 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 15:59:45,239 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:59:45,239 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:59:45,239 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:59:45,240 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:59:45,240 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:59:45,240 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:59:45,241 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:59:45,241 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:59:45,241 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:59:45,241 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:59:45,241 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:59:45,242 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:59:45,242 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:59:45,242 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:59:45,242 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:59:45,242 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:59:45,243 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:59:45,243 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:59:45,243 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:59:45,243 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:59:45,243 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:59:45,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:59:45,244 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:59:45,244 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:59:45,244 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 15:59:45,287 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:59:45,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:59:45,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:59:45,305 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:59:45,305 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:59:45,306 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_true-unreach-call_true-termination.i [2018-10-22 15:59:45,373 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/749964322/dee250a43062452f8a656176842c08db/FLAGac00fff4b [2018-10-22 15:59:45,807 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:59:45,808 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_true-unreach-call_true-termination.i [2018-10-22 15:59:45,816 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/749964322/dee250a43062452f8a656176842c08db/FLAGac00fff4b [2018-10-22 15:59:45,842 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/749964322/dee250a43062452f8a656176842c08db [2018-10-22 15:59:45,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:59:45,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:59:45,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:59:45,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:59:45,864 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:59:45,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:59:45" (1/1) ... [2018-10-22 15:59:45,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b59c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:45, skipping insertion in model container [2018-10-22 15:59:45,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:59:45" (1/1) ... [2018-10-22 15:59:45,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:59:45,907 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:59:46,092 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:59:46,096 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:59:46,111 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:59:46,123 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:59:46,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46 WrapperNode [2018-10-22 15:59:46,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:59:46,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:59:46,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:59:46,125 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:59:46,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:59:46,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:59:46,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:59:46,144 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:59:46,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (1/1) ... [2018-10-22 15:59:46,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:59:46,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:59:46,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:59:46,165 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:59:46,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (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 [2018-10-22 15:59:46,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:59:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:59:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:59:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:59:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:59:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:59:46,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:59:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:59:46,497 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:59:46,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:59:46 BoogieIcfgContainer [2018-10-22 15:59:46,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:59:46,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:59:46,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:59:46,505 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:59:46,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:59:45" (1/3) ... [2018-10-22 15:59:46,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8642c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:59:46, skipping insertion in model container [2018-10-22 15:59:46,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:46" (2/3) ... [2018-10-22 15:59:46,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8642c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:59:46, skipping insertion in model container [2018-10-22 15:59:46,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:59:46" (3/3) ... [2018-10-22 15:59:46,518 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_true-unreach-call_true-termination.i [2018-10-22 15:59:46,540 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:59:46,551 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:59:46,576 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:59:46,630 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:59:46,631 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:59:46,631 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:59:46,632 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:59:46,632 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:59:46,632 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:59:46,632 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:59:46,632 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:59:46,633 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:59:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-22 15:59:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:59:46,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:46,680 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:46,682 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:46,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1280988026, now seen corresponding path program 1 times [2018-10-22 15:59:46,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:46,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:46,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:46,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:46,739 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:46,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:59:46,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:59:46,800 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:59:46,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:59:46,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:59:46,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:59:46,820 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-22 15:59:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:59:46,844 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-22 15:59:46,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:59:46,847 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 15:59:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:59:46,856 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:59:46,857 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:59:46,860 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 [2018-10-22 15:59:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:59:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:59:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:59:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 15:59:46,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 15:59:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:59:46,901 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 15:59:46,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:59:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 15:59:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:59:46,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:46,902 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:46,903 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:46,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:46,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1336229576, now seen corresponding path program 1 times [2018-10-22 15:59:46,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:46,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:46,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:46,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:46,905 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:47,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:59:47,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:59:47,213 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:59:47,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:59:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:59:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:59:47,216 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2018-10-22 15:59:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:59:47,293 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 15:59:47,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:59:47,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-10-22 15:59:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:59:47,295 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:59:47,295 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:59:47,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:59:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:59:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:59:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:59:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 15:59:47,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-10-22 15:59:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:59:47,302 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 15:59:47,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:59:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 15:59:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:59:47,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:47,303 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:47,304 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:47,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash -214348638, now seen corresponding path program 1 times [2018-10-22 15:59:47,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:47,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:47,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:47,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:47,307 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:47,755 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-22 15:59:47,948 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-22 15:59:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:47,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:47,977 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:59:47,978 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-22 15:59:47,980 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2018-10-22 15:59:48,029 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:59:48,030 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:59:48,534 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:59:48,536 INFO L272 AbstractInterpreter]: Visited 14 different actions 141 times. Merged at 4 different actions 64 times. Widened at 1 different actions 12 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 15:59:48,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:48,571 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:59:48,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:48,572 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:59:48,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:48,591 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:59:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:48,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:59:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:49,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:59:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:49,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:49,736 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:59:49,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:49,753 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:59:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:49,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:59:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:49,857 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:59:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:49,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:59:49,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 15:59:49,940 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:59:49,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:59:49,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:59:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:59:49,943 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2018-10-22 15:59:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:59:50,282 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-22 15:59:50,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:59:50,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2018-10-22 15:59:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:59:50,284 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:59:50,284 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:59:50,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:59:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:59:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 15:59:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:59:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-22 15:59:50,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2018-10-22 15:59:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:59:50,290 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-22 15:59:50,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:59:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-22 15:59:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:59:50,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:50,292 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:50,292 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:50,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1462115102, now seen corresponding path program 2 times [2018-10-22 15:59:50,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:50,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:50,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:50,294 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:59:50,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:50,641 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:59:50,641 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:59:50,641 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:59:50,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:50,642 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:59:50,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:59:50,658 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:59:50,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:59:50,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:59:50,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:59:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:51,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:59:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:51,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:51,575 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:59:51,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:59:51,591 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:59:51,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:59:51,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:59:51,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:59:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:51,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:59:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:59:51,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:59:51,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 13, 13] total 29 [2018-10-22 15:59:51,765 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:59:51,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:59:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:59:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:59:51,767 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2018-10-22 15:59:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:59:52,282 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-10-22 15:59:52,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:59:52,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-10-22 15:59:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:59:52,283 INFO L225 Difference]: With dead ends: 26 [2018-10-22 15:59:52,283 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:59:52,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:59:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:59:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:59:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:59:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:59:52,286 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-10-22 15:59:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:59:52,287 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:59:52,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:59:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:59:52,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:59:52,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:59:52,423 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 15:59:52,424 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:59:52,424 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:59:52,424 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 15:59:52,424 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 15:59:52,424 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:59:52,424 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-10-22 15:59:52,425 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-10-22 15:59:52,425 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 15:59:52,425 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 16) no Hoare annotation was computed. [2018-10-22 15:59:52,425 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 18) no Hoare annotation was computed. [2018-10-22 15:59:52,425 INFO L425 ceAbstractionStarter]: For program point L14-3(lines 14 16) no Hoare annotation was computed. [2018-10-22 15:59:52,425 INFO L421 ceAbstractionStarter]: At program point L14-4(lines 14 16) the Hoare annotation is: (or (let ((.cse1 (* 2 main_~i~0)) (.cse0 (+ main_~sn~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (< main_~sn~0 (+ (* 2 main_~n~0) 1)))) (and (= main_~i~0 1) (= main_~sn~0 0))) [2018-10-22 15:59:52,425 INFO L421 ceAbstractionStarter]: At program point L14-5(lines 14 16) the Hoare annotation is: (or (let ((.cse0 (* 2 main_~n~0))) (and (<= .cse0 main_~sn~0) (< main_~sn~0 (+ .cse0 1)))) (= main_~sn~0 0)) [2018-10-22 15:59:52,426 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-10-22 15:59:52,426 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2018-10-22 15:59:52,426 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-10-22 15:59:52,426 INFO L425 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-10-22 15:59:52,426 INFO L425 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-10-22 15:59:52,427 INFO L425 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-10-22 15:59:52,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:59:52 BoogieIcfgContainer [2018-10-22 15:59:52,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:59:52,441 INFO L168 Benchmark]: Toolchain (without parser) took 6585.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.1 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -442.7 MB). Peak memory consumption was 294.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:59:52,443 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-10-22 15:59:52,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.68 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. [2018-10-22 15:59:52,445 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.03 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. [2018-10-22 15:59:52,446 INFO L168 Benchmark]: Boogie Preprocessor took 20.19 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. [2018-10-22 15:59:52,446 INFO L168 Benchmark]: RCFGBuilder took 334.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -789.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:59:52,447 INFO L168 Benchmark]: TraceAbstraction took 5941.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 336.7 MB). Peak memory consumption was 336.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:59:52,452 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 265.68 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 19.03 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 20.19 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 334.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -789.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5941.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 336.7 MB). Peak memory consumption was 336.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 14]: Loop Invariant Derived loop invariant: ((sn + 2 <= 2 * i && 2 * i <= sn + 2) && sn < 2 * n + 1) || (i == 1 && sn == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 5.8s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 12 SDslu, 202 SDs, 0 SdLazy, 179 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 113 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 21 NumberOfFragments, 52 HoareAnnotationTreeSize, 12 FomulaSimplifications, 61 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 100 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 191 ConstructedInterpolants, 24 QuantifiedInterpolants, 28889 SizeOfPredicates, 16 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 7/85 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...