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_INTCON-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 23:54:01,421 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 23:54:01,423 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 23:54:01,435 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 23:54:01,435 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 23:54:01,437 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 23:54:01,438 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 23:54:01,440 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 23:54:01,442 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 23:54:01,443 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 23:54:01,443 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 23:54:01,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 23:54:01,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 23:54:01,446 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 23:54:01,447 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 23:54:01,448 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 23:54:01,449 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 23:54:01,451 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 23:54:01,453 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 23:54:01,454 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 23:54:01,456 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 23:54:01,457 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 23:54:01,460 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 23:54:01,460 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 23:54:01,460 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 23:54:01,462 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 23:54:01,463 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 23:54:01,464 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 23:54:01,464 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 23:54:01,466 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 23:54:01,466 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 23:54:01,467 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 23:54:01,467 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 23:54:01,467 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 23:54:01,468 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 23:54:01,469 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 23:54:01,469 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_INTCON-OldIcfg.epf [2018-09-11 23:54:01,493 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 23:54:01,494 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 23:54:01,495 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 23:54:01,495 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 23:54:01,495 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 23:54:01,495 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 23:54:01,496 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 23:54:01,496 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-11 23:54:01,496 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-11 23:54:01,496 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 23:54:01,496 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 23:54:01,497 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 23:54:01,497 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 23:54:01,498 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 23:54:01,498 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 23:54:01,498 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 23:54:01,499 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 23:54:01,499 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 23:54:01,499 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 23:54:01,500 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 23:54:01,500 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 23:54:01,500 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 23:54:01,500 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 23:54:01,500 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 23:54:01,501 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 23:54:01,501 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 23:54:01,501 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 23:54:01,501 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 23:54:01,501 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 23:54:01,502 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 23:54:01,503 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 23:54:01,503 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 23:54:01,503 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 23:54:01,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 23:54:01,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 23:54:01,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 23:54:01,595 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 23:54:01,596 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 23:54:01,596 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call2.i [2018-09-11 23:54:01,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb08adff6/d46793f18d894b449f3b240489cd79b4/FLAG391277aa2 [2018-09-11 23:54:02,116 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 23:54:02,117 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call2.i [2018-09-11 23:54:02,125 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb08adff6/d46793f18d894b449f3b240489cd79b4/FLAG391277aa2 [2018-09-11 23:54:02,144 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb08adff6/d46793f18d894b449f3b240489cd79b4 [2018-09-11 23:54:02,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 23:54:02,161 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 23:54:02,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 23:54:02,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 23:54:02,172 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 23:54:02,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5df79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02, skipping insertion in model container [2018-09-11 23:54:02,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,355 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 23:54:02,418 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 23:54:02,439 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 23:54:02,452 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 23:54:02,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02 WrapperNode [2018-09-11 23:54:02,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 23:54:02,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 23:54:02,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 23:54:02,471 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 23:54:02,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 23:54:02,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 23:54:02,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 23:54:02,495 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 23:54:02,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (1/1) ... [2018-09-11 23:54:02,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 23:54:02,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 23:54:02,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 23:54:02,523 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 23:54:02,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (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 [2018-09-11 23:54:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 23:54:02,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 23:54:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 23:54:02,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 23:54:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 23:54:02,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 23:54:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_diamond_true_unreach_call__i____VERIFIER_assert [2018-09-11 23:54:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_diamond_true_unreach_call__i____VERIFIER_assert [2018-09-11 23:54:03,279 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 23:54:03,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:54:03 BoogieIcfgContainer [2018-09-11 23:54:03,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 23:54:03,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 23:54:03,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 23:54:03,284 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 23:54:03,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 11:54:02" (1/3) ... [2018-09-11 23:54:03,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efafd3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:54:03, skipping insertion in model container [2018-09-11 23:54:03,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:02" (2/3) ... [2018-09-11 23:54:03,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efafd3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:54:03, skipping insertion in model container [2018-09-11 23:54:03,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:54:03" (3/3) ... [2018-09-11 23:54:03,288 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_true-unreach-call2.i [2018-09-11 23:54:03,298 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 23:54:03,307 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 23:54:03,355 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 23:54:03,355 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 23:54:03,355 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 23:54:03,356 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 23:54:03,356 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 23:54:03,356 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 23:54:03,356 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 23:54:03,356 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 23:54:03,356 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 23:54:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-09-11 23:54:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-11 23:54:03,381 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:54:03,383 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:54:03,384 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_diamond_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:54:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 46027330, now seen corresponding path program 1 times [2018-09-11 23:54:03,392 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:54:03,394 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-09-11 23:54:03,396 INFO L202 CegarAbsIntRunner]: [0], [4], [76], [80], [83], [85], [91], [92], [93], [95] [2018-09-11 23:54:03,435 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:54:03,435 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:54:03,510 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 23:54:03,511 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 3 variables. [2018-09-11 23:54:03,535 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 23:54:03,579 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-09-11 23:54:03,579 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 23:54:03,589 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 23:54:03,590 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 23:54:03,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 23:54:03,592 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 23:54:03,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 23:54:03,603 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 23:54:03,604 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 23:54:03,607 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2018-09-11 23:54:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 23:54:03,770 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2018-09-11 23:54:03,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 23:54:03,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-09-11 23:54:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 23:54:03,783 INFO L225 Difference]: With dead ends: 42 [2018-09-11 23:54:03,783 INFO L226 Difference]: Without dead ends: 25 [2018-09-11 23:54:03,787 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 23:54:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-11 23:54:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-09-11 23:54:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-11 23:54:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-11 23:54:03,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2018-09-11 23:54:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 23:54:03,831 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-11 23:54:03,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 23:54:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-11 23:54:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-11 23:54:03,835 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:54:03,835 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:54:03,835 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_diamond_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:54:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1592807782, now seen corresponding path program 1 times [2018-09-11 23:54:03,836 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:54:03,837 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-09-11 23:54:03,837 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [17], [23], [29], [35], [41], [49], [53], [59], [65], [71], [80], [83], [85], [91], [92], [93], [95] [2018-09-11 23:54:03,841 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:54:03,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:54:03,861 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown