java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/vogal_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 16:00:14,262 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 16:00:14,265 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 16:00:14,283 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 16:00:14,283 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 16:00:14,284 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 16:00:14,286 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 16:00:14,287 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 16:00:14,289 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 16:00:14,290 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 16:00:14,291 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 16:00:14,291 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 16:00:14,292 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 16:00:14,296 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 16:00:14,297 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 16:00:14,298 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 16:00:14,306 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 16:00:14,311 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 16:00:14,313 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 16:00:14,317 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 16:00:14,318 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 16:00:14,322 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 16:00:14,325 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 16:00:14,325 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 16:00:14,326 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 16:00:14,327 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 16:00:14,328 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 16:00:14,329 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 16:00:14,330 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 16:00:14,331 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 16:00:14,331 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 16:00:14,331 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 16:00:14,336 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 16:00:14,336 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 16:00:14,337 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 16:00:14,338 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 16:00:14,338 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-22 16:00:14,371 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 16:00:14,371 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 16:00:14,374 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 16:00:14,374 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 16:00:14,374 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 16:00:14,374 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 16:00:14,374 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 16:00:14,377 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 16:00:14,377 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 16:00:14,377 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 16:00:14,377 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 16:00:14,378 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 16:00:14,378 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 16:00:14,382 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 16:00:14,382 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 16:00:14,382 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 16:00:14,382 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 16:00:14,382 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 16:00:14,383 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 16:00:14,383 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 16:00:14,383 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 16:00:14,383 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 16:00:14,384 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 16:00:14,385 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 16:00:14,385 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 16:00:14,386 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 16:00:14,386 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 16:00:14,386 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 16:00:14,386 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 16:00:14,386 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 16:00:14,387 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 16:00:14,387 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 16:00:14,387 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 16:00:14,387 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 16:00:14,460 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 16:00:14,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 16:00:14,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 16:00:14,480 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 16:00:14,480 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 16:00:14,481 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/vogal_true-unreach-call.i [2018-10-22 16:00:14,538 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30573370f/5b362157812a45619fa2dfd4d0cbfa07/FLAGae492c647 [2018-10-22 16:00:15,032 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 16:00:15,033 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal_true-unreach-call.i [2018-10-22 16:00:15,044 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30573370f/5b362157812a45619fa2dfd4d0cbfa07/FLAGae492c647 [2018-10-22 16:00:15,061 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30573370f/5b362157812a45619fa2dfd4d0cbfa07 [2018-10-22 16:00:15,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 16:00:15,075 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 16:00:15,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 16:00:15,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 16:00:15,081 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 16:00:15,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0c831f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15, skipping insertion in model container [2018-10-22 16:00:15,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 16:00:15,122 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 16:00:15,325 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:00:15,330 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 16:00:15,363 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:00:15,387 INFO L193 MainTranslator]: Completed translation [2018-10-22 16:00:15,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15 WrapperNode [2018-10-22 16:00:15,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 16:00:15,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 16:00:15,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 16:00:15,389 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 16:00:15,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 16:00:15,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 16:00:15,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 16:00:15,458 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 16:00:15,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... [2018-10-22 16:00:15,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 16:00:15,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 16:00:15,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 16:00:15,535 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 16:00:15,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 16:00:15,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 16:00:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 16:00:15,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 16:00:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 16:00:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 16:00:15,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 16:00:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 16:00:15,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 16:00:16,455 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 16:00:16,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:00:16 BoogieIcfgContainer [2018-10-22 16:00:16,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 16:00:16,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 16:00:16,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 16:00:16,461 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 16:00:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 04:00:15" (1/3) ... [2018-10-22 16:00:16,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1333810e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:00:16, skipping insertion in model container [2018-10-22 16:00:16,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:00:15" (2/3) ... [2018-10-22 16:00:16,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1333810e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:00:16, skipping insertion in model container [2018-10-22 16:00:16,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:00:16" (3/3) ... [2018-10-22 16:00:16,465 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal_true-unreach-call.i [2018-10-22 16:00:16,475 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 16:00:16,485 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 16:00:16,503 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 16:00:16,535 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 16:00:16,536 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 16:00:16,536 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 16:00:16,537 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 16:00:16,537 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 16:00:16,537 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 16:00:16,537 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 16:00:16,537 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 16:00:16,538 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 16:00:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-10-22 16:00:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 16:00:16,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:16,567 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:16,571 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:16,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -450684723, now seen corresponding path program 1 times [2018-10-22 16:00:16,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:16,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:16,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:16,639 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:16,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:00:16,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 16:00:16,765 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:00:16,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 16:00:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 16:00:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:00:16,797 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-10-22 16:00:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:16,825 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2018-10-22 16:00:16,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 16:00:16,827 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-10-22 16:00:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:16,835 INFO L225 Difference]: With dead ends: 77 [2018-10-22 16:00:16,835 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 16:00:16,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:00:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 16:00:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-22 16:00:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 16:00:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2018-10-22 16:00:16,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 18 [2018-10-22 16:00:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:16,878 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2018-10-22 16:00:16,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 16:00:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2018-10-22 16:00:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 16:00:16,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:16,880 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:16,880 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:16,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1427074857, now seen corresponding path program 1 times [2018-10-22 16:00:16,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:16,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:16,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:16,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:16,886 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:17,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:00:17,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 16:00:17,026 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:00:17,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 16:00:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 16:00:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 16:00:17,029 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 3 states. [2018-10-22 16:00:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:17,184 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2018-10-22 16:00:17,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 16:00:17,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-10-22 16:00:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:17,191 INFO L225 Difference]: With dead ends: 83 [2018-10-22 16:00:17,192 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 16:00:17,194 INFO L605 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 [2018-10-22 16:00:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 16:00:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2018-10-22 16:00:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 16:00:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2018-10-22 16:00:17,211 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2018-10-22 16:00:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:17,212 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2018-10-22 16:00:17,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 16:00:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2018-10-22 16:00:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 16:00:17,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:17,215 INFO L375 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, 1, 1, 1, 1] [2018-10-22 16:00:17,216 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:17,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash 367341036, now seen corresponding path program 1 times [2018-10-22 16:00:17,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:17,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:17,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:17,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:17,219 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:17,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:17,411 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:17,412 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-10-22 16:00:17,415 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [28], [30], [33], [39], [43], [46], [72], [76], [78], [81], [110], [113], [115], [121], [122], [123], [125] [2018-10-22 16:00:17,478 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:00:17,479 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:00:17,756 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:00:30,378 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:00:30,380 INFO L272 AbstractInterpreter]: Visited 25 different actions 1793 times. Merged at 9 different actions 1590 times. Widened at 2 different actions 346 times. Found 177 fixpoints after 2 different actions. Largest state had 44 variables. [2018-10-22 16:00:30,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:30,433 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:00:30,737 INFO L232 lantSequenceWeakener]: Weakened 25 states. On average, predicates are now at 87.01% of their original sizes. [2018-10-22 16:00:30,737 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:00:31,589 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:00:31,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:00:31,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2018-10-22 16:00:31,593 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:00:31,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 16:00:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 16:00:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:00:31,594 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 11 states. [2018-10-22 16:00:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:34,554 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions. [2018-10-22 16:00:34,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 16:00:34,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-10-22 16:00:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:34,559 INFO L225 Difference]: With dead ends: 135 [2018-10-22 16:00:34,560 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 16:00:34,561 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-22 16:00:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 16:00:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 60. [2018-10-22 16:00:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 16:00:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2018-10-22 16:00:34,588 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 27 [2018-10-22 16:00:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:34,588 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2018-10-22 16:00:34,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 16:00:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2018-10-22 16:00:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 16:00:34,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:34,595 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:34,596 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:34,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:34,596 INFO L82 PathProgramCache]: Analyzing trace with hash -277715294, now seen corresponding path program 1 times [2018-10-22 16:00:34,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:34,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:34,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:34,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:34,598 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-22 16:00:34,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:34,756 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:34,756 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-10-22 16:00:34,756 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [28], [30], [33], [39], [43], [46], [72], [76], [78], [81], [83], [87], [90], [92], [95], [99], [103], [110], [113], [115], [121], [122], [123], [125] [2018-10-22 16:00:34,760 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:00:34,760 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:00:34,777 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:01:27,592 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:01:27,592 INFO L272 AbstractInterpreter]: Visited 33 different actions 7744 times. Merged at 19 different actions 5549 times. Widened at 5 different actions 1219 times. Found 674 fixpoints after 7 different actions. Largest state had 49 variables. [2018-10-22 16:01:27,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:01:27,599 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:01:27,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:01:27,600 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:01:27,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:01:27,609 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:01:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:01:27,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:01:27,728 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-22 16:01:27,749 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 16:01:27,749 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 16:01:27,766 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:01:27,772 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:01:27,773 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-10-22 16:01:28,000 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-10-22 16:01:28,014 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-10-22 16:01:28,014 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 16:01:28,039 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:01:28,065 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:01:28,065 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-10-22 16:01:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 16:01:28,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:01:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 16:01:28,516 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-22 16:01:28,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2018-10-22 16:01:28,517 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:01:28,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:01:28,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:01:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-10-22 16:01:28,518 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 7 states. [2018-10-22 16:01:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:01:28,874 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2018-10-22 16:01:28,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:01:28,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2018-10-22 16:01:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:01:28,877 INFO L225 Difference]: With dead ends: 85 [2018-10-22 16:01:28,877 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 16:01:28,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-10-22 16:01:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 16:01:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-22 16:01:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-22 16:01:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2018-10-22 16:01:28,899 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 37 [2018-10-22 16:01:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:01:28,900 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2018-10-22 16:01:28,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:01:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2018-10-22 16:01:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 16:01:28,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:01:28,902 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:01:28,902 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:01:28,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:01:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash 70555662, now seen corresponding path program 1 times [2018-10-22 16:01:28,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:01:28,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:01:28,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:01:28,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:01:28,904 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:01:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:01:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-22 16:01:29,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:01:29,179 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:01:29,179 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-10-22 16:01:29,180 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [28], [30], [33], [35], [39], [43], [46], [48], [52], [55], [57], [60], [64], [68], [72], [76], [78], [81], [110], [113], [115], [121], [122], [123], [125] [2018-10-22 16:01:29,185 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:01:29,185 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:01:29,219 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:02:53,620 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:02:53,621 INFO L272 AbstractInterpreter]: Visited 34 different actions 12202 times. Merged at 24 different actions 9188 times. Widened at 8 different actions 2232 times. Found 1437 fixpoints after 10 different actions. Largest state had 50 variables. [2018-10-22 16:02:53,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:02:53,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:02:53,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:02:53,628 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:02:53,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:02:53,637 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:02:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:02:53,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:02:53,767 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-22 16:02:53,769 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-22 16:02:53,769 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 16:02:53,772 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:02:53,778 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:02:53,779 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-10-22 16:02:53,951 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2018-10-22 16:02:53,953 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2018-10-22 16:02:53,953 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 16:02:53,963 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:02:53,968 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 16:02:53,968 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2018-10-22 16:02:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 16:02:53,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:02:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:02:54,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-22 16:02:54,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2018-10-22 16:02:54,108 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:02:54,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:02:54,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:02:54,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-10-22 16:02:54,110 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 7 states. [2018-10-22 16:02:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:02:54,394 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2018-10-22 16:02:54,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:02:54,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-10-22 16:02:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:02:54,397 INFO L225 Difference]: With dead ends: 91 [2018-10-22 16:02:54,397 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 16:02:54,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-10-22 16:02:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 16:02:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-22 16:02:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 16:02:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2018-10-22 16:02:54,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2018-10-22 16:02:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:02:54,411 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2018-10-22 16:02:54,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:02:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2018-10-22 16:02:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 16:02:54,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:02:54,413 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:02:54,413 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:02:54,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:02:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1835157675, now seen corresponding path program 1 times [2018-10-22 16:02:54,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:02:54,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:02:54,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:02:54,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:02:54,415 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:02:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:02:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-22 16:02:54,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:02:54,524 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:02:54,524 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2018-10-22 16:02:54,525 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [28], [30], [33], [35], [39], [43], [46], [72], [76], [78], [81], [83], [87], [90], [92], [95], [99], [103], [110], [113], [115], [121], [122], [123], [125] [2018-10-22 16:02:54,527 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:02:54,527 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:02:54,539 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-22 16:04:20,382 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-22 16:04:20,383 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-22 16:04:20,383 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:04:20,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:04:20,383 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:04:20,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:04:20,391 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:04:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:04:20,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:04:20,428 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 16:04:20,629 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:04:20,629 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 16:04:20,635 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 16:04:20,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:04:20 BoogieIcfgContainer [2018-10-22 16:04:20,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:04:20,636 INFO L168 Benchmark]: Toolchain (without parser) took 245562.45 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 25.0 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-22 16:04:20,638 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-10-22 16:04:20,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 16:04:20,639 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:04:20,640 INFO L168 Benchmark]: Boogie Preprocessor took 74.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:04:20,640 INFO L168 Benchmark]: RCFGBuilder took 923.92 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 708.8 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -713.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2018-10-22 16:04:20,641 INFO L168 Benchmark]: TraceAbstraction took 244178.00 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 727.7 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-22 16:04:20,645 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.19 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 68.29 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 74.48 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 923.92 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 708.8 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -713.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244178.00 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 727.7 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 6]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 6). Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 4 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. TIMEOUT Result, 244.1s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 3.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 186 SDtfs, 379 SDslu, 400 SDs, 0 SdLazy, 125 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 236.1s AbstIntTime, 4 AbstIntIterations, 1 AbstIntStrong, 0.9488927738927738 AbsIntWeakeningRatio, 1.8846153846153846 AbsIntAvgWeakeningVarsNumRemoved, 329.53846153846155 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 92 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 221 NumberOfCodeBlocks, 221 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 288 ConstructedInterpolants, 0 QuantifiedInterpolants, 35740 SizeOfPredicates, 32 NumberOfNonLiveVariables, 352 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 37/50 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown