java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 18:16:37,383 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 18:16:37,385 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 18:16:37,397 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 18:16:37,398 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 18:16:37,399 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 18:16:37,400 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 18:16:37,402 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 18:16:37,403 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 18:16:37,404 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 18:16:37,405 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 18:16:37,405 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 18:16:37,406 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 18:16:37,407 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 18:16:37,410 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 18:16:37,414 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 18:16:37,418 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 18:16:37,420 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 18:16:37,425 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 18:16:37,427 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 18:16:37,430 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 18:16:37,431 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 18:16:37,436 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 18:16:37,437 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 18:16:37,437 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 18:16:37,440 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 18:16:37,441 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 18:16:37,442 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 18:16:37,447 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 18:16:37,448 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 18:16:37,448 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 18:16:37,449 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 18:16:37,453 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf [2018-07-23 18:16:37,475 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 18:16:37,475 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 18:16:37,476 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 18:16:37,476 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-23 18:16:37,476 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-23 18:16:37,477 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-23 18:16:37,477 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-23 18:16:37,477 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-23 18:16:37,477 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-23 18:16:37,477 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-23 18:16:37,478 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-23 18:16:37,478 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 18:16:37,479 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 18:16:37,479 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 18:16:37,479 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 18:16:37,479 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 18:16:37,479 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 18:16:37,479 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 18:16:37,480 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 18:16:37,480 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 18:16:37,480 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 18:16:37,480 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 18:16:37,480 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 18:16:37,481 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 18:16:37,481 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 18:16:37,481 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 18:16:37,481 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 18:16:37,481 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-23 18:16:37,482 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 18:16:37,482 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 18:16:37,482 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 18:16:37,482 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 18:16:37,482 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-23 18:16:37,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 18:16:37,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 18:16:37,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 18:16:37,545 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 18:16:37,545 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 18:16:37,546 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-07-23 18:16:37,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982f9a232/0bea1a7db76c49439cf96cfb62a4e66f/FLAG62eb59a89 [2018-07-23 18:16:38,101 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 18:16:38,102 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-07-23 18:16:38,108 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982f9a232/0bea1a7db76c49439cf96cfb62a4e66f/FLAG62eb59a89 [2018-07-23 18:16:38,123 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982f9a232/0bea1a7db76c49439cf96cfb62a4e66f [2018-07-23 18:16:38,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 18:16:38,136 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 18:16:38,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 18:16:38,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 18:16:38,146 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 18:16:38,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666d3f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38, skipping insertion in model container [2018-07-23 18:16:38,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,315 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 18:16:38,350 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 18:16:38,365 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 18:16:38,376 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 18:16:38,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38 WrapperNode [2018-07-23 18:16:38,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 18:16:38,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 18:16:38,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 18:16:38,392 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 18:16:38,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 18:16:38,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 18:16:38,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 18:16:38,416 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 18:16:38,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... [2018-07-23 18:16:38,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 18:16:38,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 18:16:38,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 18:16:38,445 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 18:16:38,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 18:16:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-23 18:16:38,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-23 18:16:38,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 18:16:38,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 18:16:38,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 18:16:38,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 18:16:38,528 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assert [2018-07-23 18:16:38,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assert [2018-07-23 18:16:39,156 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 18:16:39,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:16:39 BoogieIcfgContainer [2018-07-23 18:16:39,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 18:16:39,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 18:16:39,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 18:16:39,161 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 18:16:39,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:16:38" (1/3) ... [2018-07-23 18:16:39,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2140b830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:16:39, skipping insertion in model container [2018-07-23 18:16:39,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:16:38" (2/3) ... [2018-07-23 18:16:39,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2140b830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:16:39, skipping insertion in model container [2018-07-23 18:16:39,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:16:39" (3/3) ... [2018-07-23 18:16:39,165 INFO L112 eAbstractionObserver]: Analyzing ICFG nested6_true-unreach-call_true-termination.i [2018-07-23 18:16:39,175 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 18:16:39,184 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 18:16:39,234 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 18:16:39,235 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 18:16:39,235 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 18:16:39,235 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 18:16:39,235 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 18:16:39,235 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 18:16:39,236 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 18:16:39,236 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 18:16:39,236 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 18:16:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-07-23 18:16:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 18:16:39,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:39,263 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:39,263 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash 416534784, now seen corresponding path program 1 times [2018-07-23 18:16:39,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:39,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:39,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:39,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:39,325 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:16:39,512 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 18:16:39,513 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-23 18:16:39,513 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:16:39,516 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 18:16:39,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 18:16:39,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 18:16:39,531 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2018-07-23 18:16:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:39,735 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2018-07-23 18:16:39,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 18:16:39,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-07-23 18:16:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:39,747 INFO L225 Difference]: With dead ends: 63 [2018-07-23 18:16:39,747 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 18:16:39,751 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 18:16:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 18:16:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 18:16:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 18:16:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-07-23 18:16:39,796 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2018-07-23 18:16:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:39,797 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-07-23 18:16:39,797 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 18:16:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-07-23 18:16:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 18:16:39,798 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:39,798 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:39,799 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:39,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1670630326, now seen corresponding path program 1 times [2018-07-23 18:16:39,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:39,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:39,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:39,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:39,801 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:16:39,960 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 18:16:39,960 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-23 18:16:39,960 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:16:39,962 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 18:16:39,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 18:16:39,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 18:16:39,963 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2018-07-23 18:16:40,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:40,557 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-07-23 18:16:40,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 18:16:40,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-07-23 18:16:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:40,560 INFO L225 Difference]: With dead ends: 44 [2018-07-23 18:16:40,560 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 18:16:40,561 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-23 18:16:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 18:16:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2018-07-23 18:16:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 18:16:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-07-23 18:16:40,571 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2018-07-23 18:16:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:40,571 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-07-23 18:16:40,571 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 18:16:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-07-23 18:16:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 18:16:40,573 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:40,573 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:40,573 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash 767827044, now seen corresponding path program 1 times [2018-07-23 18:16:40,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:40,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:40,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:40,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:40,575 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:16:40,812 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:40,813 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:40,814 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-07-23 18:16:40,816 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [53], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86] [2018-07-23 18:16:40,867 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:16:40,868 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:16:40,991 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-23 18:16:40,993 INFO L272 AbstractInterpreter]: Visited 20 different actions 24 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-07-23 18:16:40,998 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-23 18:16:41,104 INFO L232 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 54.44% of their original sizes. [2018-07-23 18:16:41,106 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-23 18:16:41,610 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-23 18:16:41,612 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-23 18:16:41,612 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-07-23 18:16:41,612 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:16:41,613 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 18:16:41,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 18:16:41,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-07-23 18:16:41,614 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2018-07-23 18:16:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:43,286 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2018-07-23 18:16:43,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 18:16:43,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-07-23 18:16:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:43,289 INFO L225 Difference]: With dead ends: 107 [2018-07-23 18:16:43,289 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 18:16:43,290 INFO L573 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-07-23 18:16:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 18:16:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-07-23 18:16:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 18:16:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-07-23 18:16:43,310 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 22 [2018-07-23 18:16:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:43,311 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-07-23 18:16:43,311 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 18:16:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-07-23 18:16:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 18:16:43,312 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:43,312 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:43,313 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash -676333797, now seen corresponding path program 1 times [2018-07-23 18:16:43,313 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:43,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:43,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:43,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:43,315 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:16:43,502 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:43,502 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:43,502 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-07-23 18:16:43,504 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [36], [40], [43], [53], [57], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86] [2018-07-23 18:16:43,506 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:16:43,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:16:43,521 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-23 18:16:43,521 INFO L272 AbstractInterpreter]: Visited 23 different actions 27 times. Never merged. Never widened. Never found a fixpoint. Largest state had 8 variables. [2018-07-23 18:16:43,538 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-23 18:16:43,577 INFO L232 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 46.86% of their original sizes. [2018-07-23 18:16:43,577 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-23 18:16:43,914 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-23 18:16:43,914 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-23 18:16:43,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2018-07-23 18:16:43,915 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:16:43,916 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 18:16:43,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 18:16:43,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-07-23 18:16:43,917 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 14 states. [2018-07-23 18:16:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:45,826 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2018-07-23 18:16:45,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 18:16:45,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-07-23 18:16:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:45,829 INFO L225 Difference]: With dead ends: 139 [2018-07-23 18:16:45,829 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 18:16:45,830 INFO L573 BasicCegarLoop]: 2 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2018-07-23 18:16:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 18:16:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2018-07-23 18:16:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 18:16:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-07-23 18:16:45,854 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 28 [2018-07-23 18:16:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:45,854 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-07-23 18:16:45,854 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 18:16:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-07-23 18:16:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 18:16:45,856 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:45,856 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:45,856 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash 542199398, now seen corresponding path program 1 times [2018-07-23 18:16:45,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:45,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:45,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:45,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:45,858 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-07-23 18:16:45,984 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:45,984 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:45,984 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-07-23 18:16:45,985 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [36], [40], [43], [45], [48], [53], [57], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86] [2018-07-23 18:16:45,987 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:16:45,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:16:46,143 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 18:16:46,145 INFO L272 AbstractInterpreter]: Visited 29 different actions 313 times. Merged at 11 different actions 108 times. Widened at 3 different actions 16 times. Found 15 fixpoints after 4 different actions. Largest state had 9 variables. [2018-07-23 18:16:46,193 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 18:16:46,193 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:46,193 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 18:16:46,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:46,209 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:16:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:46,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 18:16:46,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 18:16:46,570 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:46,570 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:16:46,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:46,590 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:16:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:46,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 18:16:46,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 18:16:46,979 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:16:46,979 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6] total 11 [2018-07-23 18:16:46,979 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:16:46,980 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 18:16:46,980 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 18:16:46,981 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-07-23 18:16:46,981 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 11 states. [2018-07-23 18:16:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:47,579 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2018-07-23 18:16:47,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 18:16:47,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-07-23 18:16:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:47,584 INFO L225 Difference]: With dead ends: 113 [2018-07-23 18:16:47,585 INFO L226 Difference]: Without dead ends: 86 [2018-07-23 18:16:47,585 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-07-23 18:16:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-23 18:16:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2018-07-23 18:16:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 18:16:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2018-07-23 18:16:47,609 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 36 [2018-07-23 18:16:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:47,610 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2018-07-23 18:16:47,610 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 18:16:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2018-07-23 18:16:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 18:16:47,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:47,612 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:47,612 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1487760091, now seen corresponding path program 1 times [2018-07-23 18:16:47,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:47,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:47,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:47,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:47,614 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 18:16:47,796 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:47,796 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:47,796 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 48 with the following transitions: [2018-07-23 18:16:47,796 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86], [87] [2018-07-23 18:16:47,798 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:16:47,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:16:47,884 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-23 18:16:47,884 INFO L272 AbstractInterpreter]: Visited 27 different actions 258 times. Merged at 12 different actions 107 times. Widened at 4 different actions 17 times. Found 11 fixpoints after 3 different actions. Largest state had 9 variables. [2018-07-23 18:16:47,920 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-23 18:16:47,974 INFO L232 lantSequenceWeakener]: Weakened 20 states. On average, predicates are now at 55.5% of their original sizes. [2018-07-23 18:16:47,975 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-23 18:16:48,656 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-23 18:16:48,657 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-23 18:16:48,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [13] total 30 [2018-07-23 18:16:48,657 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:16:48,658 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 18:16:48,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 18:16:48,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-07-23 18:16:48,660 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 19 states. [2018-07-23 18:16:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:50,322 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2018-07-23 18:16:50,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 18:16:50,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-07-23 18:16:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:50,324 INFO L225 Difference]: With dead ends: 162 [2018-07-23 18:16:50,324 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 18:16:50,325 INFO L573 BasicCegarLoop]: 2 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2018-07-23 18:16:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 18:16:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2018-07-23 18:16:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 18:16:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2018-07-23 18:16:50,371 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 47 [2018-07-23 18:16:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:50,372 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2018-07-23 18:16:50,372 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 18:16:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2018-07-23 18:16:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 18:16:50,378 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:50,381 INFO L353 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:50,381 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1746865647, now seen corresponding path program 1 times [2018-07-23 18:16:50,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:50,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:50,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:50,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:50,383 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-23 18:16:50,521 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:50,521 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:50,522 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 53 with the following transitions: [2018-07-23 18:16:50,522 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [45], [48], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86] [2018-07-23 18:16:50,525 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:16:50,525 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:16:50,601 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 18:16:50,601 INFO L272 AbstractInterpreter]: Visited 31 different actions 365 times. Merged at 15 different actions 137 times. Widened at 5 different actions 20 times. Found 26 fixpoints after 7 different actions. Largest state had 10 variables. [2018-07-23 18:16:50,633 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 18:16:50,634 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:50,634 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 18:16:50,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:50,642 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:16:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:50,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-23 18:16:51,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-23 18:16:51,528 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:51,528 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:16:51,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:51,544 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:16:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:51,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-23 18:16:51,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-23 18:16:51,780 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:16:51,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 8] total 14 [2018-07-23 18:16:51,780 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:16:51,781 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 18:16:51,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 18:16:51,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-07-23 18:16:51,782 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 12 states. [2018-07-23 18:16:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:52,596 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2018-07-23 18:16:52,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 18:16:52,598 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-07-23 18:16:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:52,600 INFO L225 Difference]: With dead ends: 255 [2018-07-23 18:16:52,600 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 18:16:52,602 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-07-23 18:16:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 18:16:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2018-07-23 18:16:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 18:16:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2018-07-23 18:16:52,633 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 52 [2018-07-23 18:16:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:52,633 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2018-07-23 18:16:52,633 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 18:16:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2018-07-23 18:16:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 18:16:52,635 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:52,636 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:52,636 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1720427988, now seen corresponding path program 1 times [2018-07-23 18:16:52,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:52,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:52,638 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-23 18:16:52,814 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:52,814 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:52,814 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 67 with the following transitions: [2018-07-23 18:16:52,815 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [45], [48], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86], [87] [2018-07-23 18:16:52,817 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:16:52,817 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:16:52,902 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 18:16:52,902 INFO L272 AbstractInterpreter]: Visited 32 different actions 361 times. Merged at 16 different actions 132 times. Widened at 5 different actions 17 times. Found 33 fixpoints after 9 different actions. Largest state had 10 variables. [2018-07-23 18:16:52,911 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 18:16:52,912 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:52,912 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 18:16:52,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:52,922 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:16:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:52,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-23 18:16:53,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-23 18:16:53,409 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:53,410 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:16:53,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:53,426 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:16:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:53,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-23 18:16:55,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-23 18:16:55,185 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:16:55,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 19 [2018-07-23 18:16:55,186 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:16:55,186 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 18:16:55,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 18:16:55,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2018-07-23 18:16:55,187 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand 16 states. [2018-07-23 18:16:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:16:57,900 INFO L93 Difference]: Finished difference Result 591 states and 784 transitions. [2018-07-23 18:16:57,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 18:16:57,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2018-07-23 18:16:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:16:57,903 INFO L225 Difference]: With dead ends: 591 [2018-07-23 18:16:57,903 INFO L226 Difference]: Without dead ends: 264 [2018-07-23 18:16:57,908 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 256 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=872, Invalid=4383, Unknown=1, NotChecked=0, Total=5256 [2018-07-23 18:16:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-23 18:16:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 189. [2018-07-23 18:16:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 18:16:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 240 transitions. [2018-07-23 18:16:57,970 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 240 transitions. Word has length 66 [2018-07-23 18:16:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:16:57,971 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 240 transitions. [2018-07-23 18:16:57,971 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 18:16:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 240 transitions. [2018-07-23 18:16:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 18:16:57,974 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:16:57,974 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 7, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:16:57,974 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:16:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -355759697, now seen corresponding path program 2 times [2018-07-23 18:16:57,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:16:57,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:57,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:16:57,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:16:57,976 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:16:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:16:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 70 proven. 59 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2018-07-23 18:16:58,119 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:58,119 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:16:58,119 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-23 18:16:58,119 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-23 18:16:58,119 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:58,120 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 18:16:58,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 18:16:58,127 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-23 18:16:58,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 18:16:58,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:16:58,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:16:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 179 proven. 48 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-07-23 18:16:58,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:16:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 101 proven. 48 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-07-23 18:16:59,277 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:16:59,277 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:16:59,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 18:16:59,293 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-23 18:16:59,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 18:16:59,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:16:59,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:17:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 179 proven. 46 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-07-23 18:17:03,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:17:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 101 proven. 46 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2018-07-23 18:17:03,323 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:17:03,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11, 10, 10] total 23 [2018-07-23 18:17:03,323 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:17:03,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 18:17:03,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 18:17:03,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=435, Unknown=5, NotChecked=0, Total=506 [2018-07-23 18:17:03,325 INFO L87 Difference]: Start difference. First operand 189 states and 240 transitions. Second operand 17 states. [2018-07-23 18:17:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:17:05,087 INFO L93 Difference]: Finished difference Result 437 states and 575 transitions. [2018-07-23 18:17:05,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 18:17:05,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 108 [2018-07-23 18:17:05,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:17:05,088 INFO L225 Difference]: With dead ends: 437 [2018-07-23 18:17:05,088 INFO L226 Difference]: Without dead ends: 0 [2018-07-23 18:17:05,091 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 407 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=560, Invalid=2857, Unknown=5, NotChecked=0, Total=3422 [2018-07-23 18:17:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-23 18:17:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-23 18:17:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-23 18:17:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-23 18:17:05,092 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2018-07-23 18:17:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:17:05,093 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-23 18:17:05,093 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 18:17:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-23 18:17:05,093 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-23 18:17:05,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-23 18:17:05,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:05,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:05,198 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:05,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:05,532 WARN L169 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 165 [2018-07-23 18:17:05,543 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:05,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,020 WARN L169 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 195 [2018-07-23 18:17:06,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,033 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,038 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,469 WARN L169 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 198 [2018-07-23 18:17:06,533 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,719 WARN L169 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 165 [2018-07-23 18:17:06,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:06,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:07,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 18:17:07,178 WARN L169 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 200 [2018-07-23 18:17:08,541 WARN L169 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 116 DAG size of output: 31 [2018-07-23 18:17:09,705 WARN L169 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 161 DAG size of output: 26 [2018-07-23 18:17:12,015 WARN L169 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 194 DAG size of output: 26 [2018-07-23 18:17:13,197 WARN L169 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 197 DAG size of output: 26 [2018-07-23 18:17:15,953 WARN L169 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 161 DAG size of output: 26 [2018-07-23 18:17:19,406 WARN L169 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 197 DAG size of output: 38 [2018-07-23 18:17:19,410 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-07-23 18:17:19,411 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-07-23 18:17:19,411 INFO L424 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-07-23 18:17:19,411 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-07-23 18:17:19,411 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-07-23 18:17:19,411 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-07-23 18:17:19,411 INFO L421 ceAbstractionStarter]: For program point L21(lines 21 29) no Hoare annotation was computed. [2018-07-23 18:17:19,411 INFO L421 ceAbstractionStarter]: For program point L20(lines 20 30) no Hoare annotation was computed. [2018-07-23 18:17:19,411 INFO L417 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (and (let ((.cse1 (* 2 main_~i~0)) (.cse2 (* 2 main_~n~0))) (and (<= .cse1 main_~j~0) (<= .cse2 1999998) (<= .cse1 main_~k~0) (<= 0 (+ .cse2 4294967296)))) (<= (+ main_~k~0 1) main_~n~0)))) (or (and .cse0 (<= (+ main_~j~0 1) main_~n~0)) (and (<= main_~j~0 main_~i~0) .cse0))) [2018-07-23 18:17:19,411 INFO L421 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-07-23 18:17:19,412 INFO L417 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (and (let ((.cse1 (* 2 main_~n~0))) (and (<= .cse1 1999998) (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0)) (<= 0 (+ .cse1 4294967296)))) (<= main_~k~0 main_~n~0)))) (or (and .cse0 (<= main_~j~0 main_~i~0)) (and .cse0 (<= (+ main_~j~0 1) main_~n~0)))) [2018-07-23 18:17:19,412 INFO L421 ceAbstractionStarter]: For program point L19''(lines 19 31) no Hoare annotation was computed. [2018-07-23 18:17:19,412 INFO L421 ceAbstractionStarter]: For program point L28(lines 20 30) no Hoare annotation was computed. [2018-07-23 18:17:19,412 INFO L421 ceAbstractionStarter]: For program point L15'(lines 15 18) no Hoare annotation was computed. [2018-07-23 18:17:19,412 INFO L417 ceAbstractionStarter]: At program point L27'(line 27) the Hoare annotation is: (let ((.cse0 (and (let ((.cse1 (* 2 main_~n~0))) (and (<= .cse1 1999998) (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0)) (<= 0 (+ .cse1 4294967296)))) (<= main_~k~0 main_~n~0)))) (or (and .cse0 (<= main_~j~0 main_~i~0)) (and .cse0 (<= (+ main_~j~0 1) main_~n~0)))) [2018-07-23 18:17:19,412 INFO L421 ceAbstractionStarter]: For program point L23'(lines 22 24) no Hoare annotation was computed. [2018-07-23 18:17:19,412 INFO L421 ceAbstractionStarter]: For program point mainFINAL(lines 10 34) no Hoare annotation was computed. [2018-07-23 18:17:19,412 INFO L417 ceAbstractionStarter]: At program point L22''(lines 22 24) the Hoare annotation is: (let ((.cse0 (let ((.cse1 (* 2 main_~i~0)) (.cse2 (* 2 main_~n~0))) (and (<= .cse1 main_~j~0) (<= .cse2 1999998) (<= .cse1 main_~k~0) (<= 0 (+ .cse2 4294967296)))))) (or (and .cse0 (<= main_~j~0 main_~i~0) (<= main_~k~0 main_~j~0)) (and (<= (+ main_~j~0 1) main_~n~0) (and .cse0 (<= main_~k~0 main_~n~0))))) [2018-07-23 18:17:19,412 INFO L424 ceAbstractionStarter]: At program point L32(lines 10 34) the Hoare annotation is: true [2018-07-23 18:17:19,412 INFO L417 ceAbstractionStarter]: At program point L20''(lines 20 30) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0))) (let ((.cse0 (let ((.cse2 (* 2 main_~n~0))) (and (<= .cse2 1999998) (and (<= .cse1 main_~j~0) (<= main_~n~0 main_~k~0)) (<= 0 (+ .cse2 4294967296)))))) (or (and .cse0 (<= main_~k~0 main_~n~0)) (and .cse0 (<= main_~j~0 (+ main_~i~0 1)) (<= main_~k~0 main_~j~0)) (and (exists ((main_~i~0 Int) (v_main_~i~0_17 Int)) (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 (+ (* 2 v_main_~i~0_17) 2)) (<= (+ v_main_~i~0_17 1) main_~i~0))) .cse0 (<= main_~j~0 .cse1)) (and (<= main_~k~0 (+ .cse1 1)) .cse0)))) [2018-07-23 18:17:19,413 INFO L417 ceAbstractionStarter]: At program point L19'''(lines 19 31) the Hoare annotation is: (let ((.cse6 (* 2 main_~n~0))) (let ((.cse4 (<= main_~k~0 main_~n~0)) (.cse5 (* 2 main_~i~0)) (.cse0 (<= .cse6 1999998)) (.cse1 (<= 0 (+ .cse6 4294967296))) (.cse2 (<= main_~n~0 main_~k~0)) (.cse3 (<= main_~n~0 main_~j~0))) (or (and .cse0 (<= main_~j~0 main_~i~0) .cse1 .cse2 .cse3) (and .cse2 (<= main_~n~0 (+ main_~i~0 999999)) .cse1 .cse4 (= main_~i~0 0)) (and .cse0 (<= main_~j~0 .cse5) .cse1 .cse2 .cse3) (and .cse0 .cse1 .cse4 .cse2 .cse3) (and (<= main_~k~0 (+ .cse5 1)) .cse0 .cse1 .cse2 .cse3)))) [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point mainEXIT(lines 10 34) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L424 ceAbstractionStarter]: At program point mainENTRY(lines 10 34) the Hoare annotation is: true [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point L15(lines 15 18) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point L19(lines 19 31) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-07-23 18:17:19,413 INFO L424 ceAbstractionStarter]: At program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-07-23 18:17:19,414 INFO L421 ceAbstractionStarter]: For program point L4''(lines 3 8) no Hoare annotation was computed. [2018-07-23 18:17:19,424 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,425 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,426 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,427 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 06:17:19 BoogieIcfgContainer [2018-07-23 18:17:19,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 18:17:19,430 INFO L168 Benchmark]: Toolchain (without parser) took 41295.78 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -319.1 MB). Peak memory consumption was 833.6 MB. Max. memory is 7.1 GB. [2018-07-23 18:17:19,431 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. [2018-07-23 18:17:19,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.34 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. [2018-07-23 18:17:19,433 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.94 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. [2018-07-23 18:17:19,433 INFO L168 Benchmark]: Boogie Preprocessor took 28.77 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. [2018-07-23 18:17:19,434 INFO L168 Benchmark]: RCFGBuilder took 712.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -802.4 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-07-23 18:17:19,435 INFO L168 Benchmark]: TraceAbstraction took 40271.26 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 329.3 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 472.8 MB). Peak memory consumption was 875.2 MB. Max. memory is 7.1 GB. [2018-07-23 18:17:19,439 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 254.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.94 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 28.77 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 712.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -802.4 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40271.26 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 329.3 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 472.8 MB). Peak memory consumption was 875.2 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[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,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: 19]: Loop Invariant Derived loop invariant: (((((((2 * n <= 1999998 && j <= i) && 0 <= 2 * n + 4294967296) && n <= k) && n <= j) || ((((n <= k && n <= i + 999999) && 0 <= 2 * n + 4294967296) && k <= n) && i == 0)) || ((((2 * n <= 1999998 && j <= 2 * i) && 0 <= 2 * n + 4294967296) && n <= k) && n <= j)) || ((((2 * n <= 1999998 && 0 <= 2 * n + 4294967296) && k <= n) && n <= k) && n <= j)) || ((((k <= 2 * i + 1 && 2 * n <= 1999998) && 0 <= 2 * n + 4294967296) && n <= k) && n <= j) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((2 * i <= j && 2 * n <= 1999998) && 2 * i <= k) && 0 <= 2 * n + 4294967296) && j <= i) && k <= j) || (j + 1 <= n && (((2 * i <= j && 2 * n <= 1999998) && 2 * i <= k) && 0 <= 2 * n + 4294967296) && k <= n) - InvariantResult [Line: 20]: Loop Invariant [2018-07-23 18:17:19,450 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,451 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,451 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-07-23 18:17:19,452 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] Derived loop invariant: (((((2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && k <= n) || ((((2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && j <= i + 1) && k <= j)) || (((\exists main_~i~0 : int, v_main_~i~0_17 : int :: (2 * i <= j && n <= 2 * v_main_~i~0_17 + 2) && v_main_~i~0_17 + 1 <= i) && (2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && j <= 2 * i)) || (k <= 2 * i + 1 && (2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. SAFE Result, 40.1s OverallTime, 9 OverallIterations, 11 TraceHistogramMax, 11.9s AutomataDifference, 0.0s DeadEndRemovalTime, 14.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 306 SDtfs, 824 SDslu, 1450 SDs, 0 SdLazy, 1589 SolverSat, 622 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 1322 GetRequests, 1059 SyntacticMatches, 36 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 13.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 6 AbstIntIterations, 3 AbstIntStrong, 0.9317164809186083 AbsIntWeakeningRatio, 0.43617021276595747 AbsIntAvgWeakeningVarsNumRemoved, 7.24468085106383 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 231 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 173 PreInvPairs, 411 NumberOfFragments, 517 HoareAnnotationTreeSize, 173 FomulaSimplifications, 725484 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 219033 FormulaSimplificationTreeSizeReductionInter, 12.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 919 NumberOfCodeBlocks, 919 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1418 ConstructedInterpolants, 28 QuantifiedInterpolants, 288298 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1022 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 25 InterpolantComputations, 2 PerfectInterpolantSequences, 2058/2470 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested6_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Taipan_Default-old.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_18-17-19-458.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested6_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Taipan_Default-old.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_18-17-19-458.csv Received shutdown request...