java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_CON-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-08 09:33:28,557 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-08 09:33:28,559 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-08 09:33:28,572 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-08 09:33:28,572 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-08 09:33:28,574 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-08 09:33:28,575 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-08 09:33:28,577 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-08 09:33:28,579 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-08 09:33:28,579 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-08 09:33:28,580 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-08 09:33:28,581 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-08 09:33:28,582 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-08 09:33:28,583 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-08 09:33:28,584 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-08 09:33:28,585 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-08 09:33:28,586 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-08 09:33:28,588 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-08 09:33:28,590 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-08 09:33:28,592 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-08 09:33:28,593 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-08 09:33:28,594 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-08 09:33:28,597 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-08 09:33:28,598 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-08 09:33:28,598 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-08 09:33:28,599 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-08 09:33:28,600 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-08 09:33:28,601 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-08 09:33:28,602 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-08 09:33:28,603 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-08 09:33:28,604 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-08 09:33:28,605 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-08-08 09:33:28,607 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_CON-OldIcfg.epf [2018-08-08 09:33:28,624 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-08 09:33:28,624 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-08 09:33:28,625 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-08 09:33:28,625 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-08 09:33:28,625 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-08 09:33:28,625 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-08 09:33:28,626 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-08 09:33:28,626 INFO L133 SettingsManager]: * Octagon Domain=false [2018-08-08 09:33:28,626 INFO L133 SettingsManager]: * Abstract domain=CongruenceDomain [2018-08-08 09:33:28,626 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-08 09:33:28,626 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-08 09:33:28,627 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-08 09:33:28,627 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-08 09:33:28,628 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-08 09:33:28,628 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-08 09:33:28,628 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-08 09:33:28,628 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-08 09:33:28,628 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-08 09:33:28,629 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-08 09:33:28,629 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-08 09:33:28,629 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-08 09:33:28,629 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-08 09:33:28,629 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-08 09:33:28,630 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-08 09:33:28,630 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-08 09:33:28,630 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-08 09:33:28,630 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-08 09:33:28,630 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-08 09:33:28,631 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-08-08 09:33:28,631 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-08 09:33:28,631 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-08 09:33:28,631 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-08 09:33:28,631 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-08 09:33:28,632 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-08 09:33:28,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-08 09:33:28,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-08 09:33:28,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-08 09:33:28,721 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-08 09:33:28,722 INFO L276 PluginConnector]: CDTParser initialized [2018-08-08 09:33:28,723 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9_true-unreach-call_true-termination.i [2018-08-08 09:33:29,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d799722b/1b1827a80dd5419bba52a1b36053215a/FLAG54da0320f [2018-08-08 09:33:29,199 INFO L276 CDTParser]: Found 1 translation units. [2018-08-08 09:33:29,200 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9_true-unreach-call_true-termination.i [2018-08-08 09:33:29,216 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d799722b/1b1827a80dd5419bba52a1b36053215a/FLAG54da0320f [2018-08-08 09:33:29,252 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d799722b/1b1827a80dd5419bba52a1b36053215a [2018-08-08 09:33:29,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-08 09:33:29,268 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-08 09:33:29,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-08 09:33:29,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-08 09:33:29,280 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-08 09:33:29,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@235327a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29, skipping insertion in model container [2018-08-08 09:33:29,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,505 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-08 09:33:29,542 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-08 09:33:29,561 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-08 09:33:29,574 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-08 09:33:29,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29 WrapperNode [2018-08-08 09:33:29,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-08 09:33:29,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-08 09:33:29,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-08 09:33:29,588 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-08 09:33:29,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-08 09:33:29,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-08 09:33:29,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-08 09:33:29,606 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-08 09:33:29,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (1/1) ... [2018-08-08 09:33:29,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-08 09:33:29,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-08 09:33:29,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-08 09:33:29,634 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-08 09:33:29,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (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 [2018-08-08 09:33:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-08 09:33:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-08 09:33:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-08 09:33:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-08 09:33:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-08 09:33:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-08 09:33:29,707 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 [2018-08-08 09:33:29,707 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 [2018-08-08 09:33:30,191 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-08 09:33:30,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.08 09:33:30 BoogieIcfgContainer [2018-08-08 09:33:30,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-08 09:33:30,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-08 09:33:30,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-08 09:33:30,196 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-08 09:33:30,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.08 09:33:29" (1/3) ... [2018-08-08 09:33:30,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c859a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.08 09:33:30, skipping insertion in model container [2018-08-08 09:33:30,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 09:33:29" (2/3) ... [2018-08-08 09:33:30,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c859a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.08 09:33:30, skipping insertion in model container [2018-08-08 09:33:30,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.08 09:33:30" (3/3) ... [2018-08-08 09:33:30,201 INFO L112 eAbstractionObserver]: Analyzing ICFG nested9_true-unreach-call_true-termination.i [2018-08-08 09:33:30,210 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-08 09:33:30,218 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-08 09:33:30,267 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-08 09:33:30,268 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-08 09:33:30,268 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-08 09:33:30,269 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-08 09:33:30,269 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-08 09:33:30,269 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-08 09:33:30,269 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-08 09:33:30,269 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-08 09:33:30,269 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-08 09:33:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-08-08 09:33:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-08-08 09:33:30,293 INFO L368 BasicCegarLoop]: Found error trace [2018-08-08 09:33:30,294 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-08 09:33:30,295 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-08 09:33:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1899131806, now seen corresponding path program 1 times [2018-08-08 09:33:30,304 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-08-08 09:33:30,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-08-08 09:33:30,307 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [28], [33], [37], [42], [46], [51], [68], [71], [73], [79], [80], [81], [83] [2018-08-08 09:33:30,333 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-08-08 09:33:30,333 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=2) [2018-08-08 09:33:30,404 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-08-08 09:33:30,406 INFO L272 AbstractInterpreter]: Visited 15 different actions 15 times. Never merged. Never widened. Never found a fixpoint. Largest state had 11 variables. [2018-08-08 09:33:30,420 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-08-08 09:33:30,476 INFO L232 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 85.64% of their original sizes. [2018-08-08 09:33:30,476 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-08-08 09:33:30,502 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-08-08 09:33:30,503 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-08 09:33:30,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-08 09:33:30,504 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-08 09:33:30,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-08 09:33:30,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-08 09:33:30,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-08 09:33:30,518 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2018-08-08 09:33:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-08 09:33:30,628 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2018-08-08 09:33:30,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-08 09:33:30,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-08-08 09:33:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-08 09:33:30,639 INFO L225 Difference]: With dead ends: 61 [2018-08-08 09:33:30,639 INFO L226 Difference]: Without dead ends: 32 [2018-08-08 09:33:30,643 INFO L603 BasicCegarLoop]: 2 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-08 09:33:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-08-08 09:33:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-08-08 09:33:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-08-08 09:33:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-08-08 09:33:30,684 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2018-08-08 09:33:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-08 09:33:30,685 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-08-08 09:33:30,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-08 09:33:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-08-08 09:33:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-08-08 09:33:30,687 INFO L368 BasicCegarLoop]: Found error trace [2018-08-08 09:33:30,687 INFO L376 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] [2018-08-08 09:33:30,689 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nested__true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-08 09:33:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1651874812, now seen corresponding path program 1 times [2018-08-08 09:33:30,689 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-08-08 09:33:30,690 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-08-08 09:33:30,690 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [28], [33], [37], [40], [42], [46], [51], [62], [68], [71], [73], [79], [80], [81], [83] [2018-08-08 09:33:30,692 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-08-08 09:33:30,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=2) [2018-08-08 09:33:30,720 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-08-08 09:33:30,720 INFO L272 AbstractInterpreter]: Visited 23 different actions 28 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 12 variables. [2018-08-08 09:33:30,726 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-08-08 09:33:30,743 WARN L205 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-08-08 09:33:30,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.08 09:33:30 BoogieIcfgContainer [2018-08-08 09:33:30,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-08 09:33:30,744 INFO L168 Benchmark]: Toolchain (without parser) took 1478.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -738.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-08-08 09:33:30,747 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. [2018-08-08 09:33:30,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.88 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. [2018-08-08 09:33:30,748 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.81 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. [2018-08-08 09:33:30,749 INFO L168 Benchmark]: Boogie Preprocessor took 26.84 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. [2018-08-08 09:33:30,749 INFO L168 Benchmark]: RCFGBuilder took 558.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -779.5 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-08-08 09:33:30,751 INFO L168 Benchmark]: TraceAbstraction took 551.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2018-08-08 09:33:30,756 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 314.88 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 17.81 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 26.84 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 558.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -779.5 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 551.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L10] int __BLAST_NONDET; [L12] int i,j,k,n,l,m; [L13] n = __VERIFIER_nondet_int() [L14] m = __VERIFIER_nondet_int() [L15] l = __VERIFIER_nondet_int() [L16] COND FALSE !(!(-1000000 < n && n < 1000000)) [L17] COND FALSE !(!(-1000000 < m && m < 1000000)) [L18] COND FALSE !(!(-1000000 < l && l < 1000000)) [L19] COND TRUE 3*n<=m+l [L20] i=0 [L20] COND TRUE i