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/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 10:43:55,541 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 10:43:55,544 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 10:43:55,559 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 10:43:55,559 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 10:43:55,560 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 10:43:55,561 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 10:43:55,563 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 10:43:55,565 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 10:43:55,566 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 10:43:55,567 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 10:43:55,567 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 10:43:55,568 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 10:43:55,569 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 10:43:55,570 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 10:43:55,571 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 10:43:55,575 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 10:43:55,577 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 10:43:55,581 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 10:43:55,582 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 10:43:55,586 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 10:43:55,587 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 10:43:55,594 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 10:43:55,595 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 10:43:55,595 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 10:43:55,598 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 10:43:55,599 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 10:43:55,600 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 10:43:55,600 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 10:43:55,604 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 10:43:55,604 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 10:43:55,605 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 10:43:55,605 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 10:43:55,605 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 10:43:55,606 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 10:43:55,607 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 10:43:55,607 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 10:43:55,629 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 10:43:55,629 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 10:43:55,630 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 10:43:55,631 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 10:43:55,631 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 10:43:55,631 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 10:43:55,631 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 10:43:55,631 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 10:43:55,631 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 10:43:55,632 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 10:43:55,632 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 10:43:55,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 10:43:55,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 10:43:55,633 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 10:43:55,633 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 10:43:55,633 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 10:43:55,634 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 10:43:55,634 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 10:43:55,634 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 10:43:55,634 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 10:43:55,634 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 10:43:55,635 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 10:43:55,635 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 10:43:55,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:43:55,635 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 10:43:55,635 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 10:43:55,635 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 10:43:55,636 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 10:43:55,636 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 10:43:55,636 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 10:43:55,636 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 10:43:55,636 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 10:43:55,637 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 10:43:55,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 10:43:55,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 10:43:55,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 10:43:55,725 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 10:43:55,726 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 10:43:55,727 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-07-24 10:43:56,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974d80a65/aaad016a66ce43e9b5c1c36ec1fb3d54/FLAG214a99eaa [2018-07-24 10:43:56,209 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 10:43:56,210 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-07-24 10:43:56,219 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974d80a65/aaad016a66ce43e9b5c1c36ec1fb3d54/FLAG214a99eaa [2018-07-24 10:43:56,237 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974d80a65/aaad016a66ce43e9b5c1c36ec1fb3d54 [2018-07-24 10:43:56,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 10:43:56,252 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 10:43:56,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:56,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 10:43:56,260 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 10:43:56,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fccd38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56, skipping insertion in model container [2018-07-24 10:43:56,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,439 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 10:43:56,479 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:56,495 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 10:43:56,500 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:56,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56 WrapperNode [2018-07-24 10:43:56,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:56,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:56,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 10:43:56,515 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 10:43:56,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:56,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 10:43:56,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 10:43:56,538 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 10:43:56,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 10:43:56,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 10:43:56,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 10:43:56,559 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 10:43:56,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (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 [2018-07-24 10:43:56,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 10:43:56,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 10:43:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 10:43:56,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 10:43:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 10:43:56,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 10:43:56,629 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-24 10:43:56,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-24 10:43:56,997 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 10:43:56,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:56 BoogieIcfgContainer [2018-07-24 10:43:56,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 10:43:57,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 10:43:57,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 10:43:57,011 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 10:43:57,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 10:43:56" (1/3) ... [2018-07-24 10:43:57,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d2d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:57, skipping insertion in model container [2018-07-24 10:43:57,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (2/3) ... [2018-07-24 10:43:57,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d2d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:57, skipping insertion in model container [2018-07-24 10:43:57,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:56" (3/3) ... [2018-07-24 10:43:57,025 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-07-24 10:43:57,046 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 10:43:57,055 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 10:43:57,121 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 10:43:57,122 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 10:43:57,122 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 10:43:57,123 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 10:43:57,123 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 10:43:57,123 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 10:43:57,123 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 10:43:57,123 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 10:43:57,123 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 10:43:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-07-24 10:43:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-24 10:43:57,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:57,152 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:57,152 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-07-24 10:43:57,161 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:57,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,231 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:57,301 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:57,301 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 10:43:57,302 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:57,306 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 10:43:57,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 10:43:57,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:43:57,322 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-07-24 10:43:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:57,344 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-07-24 10:43:57,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 10:43:57,346 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-24 10:43:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:57,355 INFO L225 Difference]: With dead ends: 31 [2018-07-24 10:43:57,355 INFO L226 Difference]: Without dead ends: 14 [2018-07-24 10:43:57,359 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:43:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-24 10:43:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-24 10:43:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-24 10:43:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-07-24 10:43:57,401 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-07-24 10:43:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:57,401 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-07-24 10:43:57,401 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 10:43:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-07-24 10:43:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-24 10:43:57,402 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:57,403 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:57,403 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-07-24 10:43:57,404 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,406 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:57,520 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:57,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 10:43:57,520 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:57,522 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 10:43:57,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 10:43:57,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:43:57,523 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-07-24 10:43:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:57,803 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-07-24 10:43:57,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:43:57,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-24 10:43:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:57,806 INFO L225 Difference]: With dead ends: 21 [2018-07-24 10:43:57,806 INFO L226 Difference]: Without dead ends: 16 [2018-07-24 10:43:57,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:43:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-24 10:43:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-24 10:43:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-24 10:43:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-07-24 10:43:57,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-07-24 10:43:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:57,815 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-07-24 10:43:57,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 10:43:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-07-24 10:43:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-24 10:43:57,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:57,816 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:57,817 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-07-24 10:43:57,817 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:57,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,819 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:57,881 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:57,881 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 10:43:57,881 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:57,883 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 10:43:57,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 10:43:57,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:43:57,884 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-07-24 10:43:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:57,947 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-07-24 10:43:57,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 10:43:57,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-07-24 10:43:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:57,949 INFO L225 Difference]: With dead ends: 27 [2018-07-24 10:43:57,949 INFO L226 Difference]: Without dead ends: 18 [2018-07-24 10:43:57,949 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:43:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-24 10:43:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-24 10:43:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-24 10:43:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-07-24 10:43:57,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-07-24 10:43:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:57,955 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-07-24 10:43:57,955 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 10:43:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-07-24 10:43:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-24 10:43:57,956 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:57,956 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:57,957 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1833562532, now seen corresponding path program 1 times [2018-07-24 10:43:57,957 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:57,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:58,459 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-07-24 10:43:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:58,547 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:58,547 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 [2018-07-24 10:43:58,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:58,560 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:58,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:58,860 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,321 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:59,321 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 [2018-07-24 10:43:59,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:59,337 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:59,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,402 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:43:59,403 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 18 [2018-07-24 10:43:59,403 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:43:59,403 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 10:43:59,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 10:43:59,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:43:59,405 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-07-24 10:43:59,891 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-07-24 10:44:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,158 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-07-24 10:44:00,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 10:44:00,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-07-24 10:44:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,161 INFO L225 Difference]: With dead ends: 30 [2018-07-24 10:44:00,161 INFO L226 Difference]: Without dead ends: 24 [2018-07-24 10:44:00,163 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-07-24 10:44:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-24 10:44:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-24 10:44:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-24 10:44:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-07-24 10:44:00,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-07-24 10:44:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,169 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-07-24 10:44:00,169 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 10:44:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-07-24 10:44:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-24 10:44:00,170 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,170 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,171 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1892022867, now seen corresponding path program 1 times [2018-07-24 10:44:00,171 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,173 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,236 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,236 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 [2018-07-24 10:44:00,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,252 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,322 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,322 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 [2018-07-24 10:44:00,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,339 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,395 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:00,395 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 5 [2018-07-24 10:44:00,395 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:00,396 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:44:00,396 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:44:00,397 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:00,397 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-07-24 10:44:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,429 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-07-24 10:44:00,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:44:00,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-07-24 10:44:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,431 INFO L225 Difference]: With dead ends: 33 [2018-07-24 10:44:00,432 INFO L226 Difference]: Without dead ends: 24 [2018-07-24 10:44:00,432 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-24 10:44:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-24 10:44:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-24 10:44:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-07-24 10:44:00,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-07-24 10:44:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,439 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-07-24 10:44:00,439 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:44:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-07-24 10:44:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-24 10:44:00,440 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,440 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,440 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1658992628, now seen corresponding path program 2 times [2018-07-24 10:44:00,441 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,442 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,502 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,502 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 [2018-07-24 10:44:00,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:00,511 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:00,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:00,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:00,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,536 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,591 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,592 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 [2018-07-24 10:44:00,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:00,608 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:00,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:00,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:00,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,721 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:00,721 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 5 [2018-07-24 10:44:00,722 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:00,722 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 10:44:00,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 10:44:00,723 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:00,723 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-07-24 10:44:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,791 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-07-24 10:44:00,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:44:00,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-07-24 10:44:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,793 INFO L225 Difference]: With dead ends: 35 [2018-07-24 10:44:00,793 INFO L226 Difference]: Without dead ends: 26 [2018-07-24 10:44:00,794 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-24 10:44:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-07-24 10:44:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-24 10:44:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-07-24 10:44:00,799 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-07-24 10:44:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,799 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-07-24 10:44:00,800 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 10:44:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-07-24 10:44:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-24 10:44:00,800 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,801 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,801 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash 849646002, now seen corresponding path program 2 times [2018-07-24 10:44:00,801 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:00,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,803 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 10:44:01,142 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,142 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 [2018-07-24 10:44:01,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:01,159 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:01,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:01,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,826 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,827 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 [2018-07-24 10:44:01,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:01,851 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:01,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:01,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:01,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 12, 12] total 27 [2018-07-24 10:44:01,953 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:01,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 10:44:01,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 10:44:01,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2018-07-24 10:44:01,954 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-07-24 10:44:02,336 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2018-07-24 10:44:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:02,712 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-07-24 10:44:02,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 10:44:02,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-07-24 10:44:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:02,718 INFO L225 Difference]: With dead ends: 38 [2018-07-24 10:44:02,718 INFO L226 Difference]: Without dead ends: 32 [2018-07-24 10:44:02,719 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2018-07-24 10:44:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-24 10:44:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-07-24 10:44:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-24 10:44:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-07-24 10:44:02,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2018-07-24 10:44:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:02,725 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-07-24 10:44:02,725 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 10:44:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-07-24 10:44:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-24 10:44:02,727 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:02,727 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:02,727 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___sum___bug___base_case_false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:02,727 INFO L82 PathProgramCache]: Analyzing trace with hash -418779461, now seen corresponding path program 3 times [2018-07-24 10:44:02,728 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:02,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:02,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:02,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:02,729 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:44:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:44:02,770 INFO L419 BasicCegarLoop]: Counterexample might be feasible [2018-07-24 10:44:02,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 10:44:02 BoogieIcfgContainer [2018-07-24 10:44:02,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 10:44:02,799 INFO L168 Benchmark]: Toolchain (without parser) took 6547.29 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -455.1 MB). Peak memory consumption was 303.6 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:02,800 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:44:02,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.75 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. [2018-07-24 10:44:02,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.23 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. [2018-07-24 10:44:02,802 INFO L168 Benchmark]: Boogie Preprocessor took 20.65 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. [2018-07-24 10:44:02,802 INFO L168 Benchmark]: RCFGBuilder took 439.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:02,803 INFO L168 Benchmark]: TraceAbstraction took 5796.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 346.0 MB). Peak memory consumption was 346.0 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:02,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.75 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 23.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.65 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 439.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5796.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 346.0 MB). Peak memory consumption was 346.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=2, n=4] [L15] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L13] i++ [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=4, n=6] [L15] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L13] i++ [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=8, n=4] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=4, n=-10] [L13] i++ [L13] i++ [L13] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 5.6s OverallTime, 8 OverallIterations, 5 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 21 SDslu, 227 SDs, 0 SdLazy, 245 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 292 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 303 NumberOfCodeBlocks, 303 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 413 ConstructedInterpolants, 24 QuantifiedInterpolants, 40093 SizeOfPredicates, 20 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 75/232 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_10-44-02-828.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_10-44-02-828.csv Received shutdown request...