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/sum01_bug02_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:55:33,791 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:55:33,794 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:55:33,809 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:55:33,809 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:55:33,812 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:55:33,813 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:55:33,815 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:55:33,818 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:55:33,819 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:55:33,820 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:55:33,820 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:55:33,821 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:55:33,825 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:55:33,826 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:55:33,833 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:55:33,834 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:55:33,839 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:55:33,841 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:55:33,842 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:55:33,844 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:55:33,845 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:55:33,847 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:55:33,847 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:55:33,848 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:55:33,848 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:55:33,850 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:55:33,852 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:55:33,853 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:55:33,854 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:55:33,854 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:55:33,856 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:55:33,856 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:55:33,856 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:55:33,859 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:55:33,860 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:55:33,861 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 15:55:33,890 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:55:33,890 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:55:33,892 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:55:33,892 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:55:33,892 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:55:33,893 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:55:33,893 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:55:33,893 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:55:33,893 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 15:55:33,894 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:55:33,895 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:55:33,895 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:55:33,896 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:55:33,896 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:55:33,896 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:55:33,896 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:55:33,898 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:55:33,899 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:55:33,899 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:55:33,899 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:55:33,899 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:55:33,900 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:55:33,900 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:55:33,900 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:55:33,900 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:55:33,900 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:55:33,901 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:55:33,901 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:55:33,901 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:55:33,901 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:55:33,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:55:33,901 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:55:33,902 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:55:33,902 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 15:55:33,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:55:33,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:55:33,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:55:33,996 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:55:33,996 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:55:33,997 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-10-22 15:55:34,073 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3139410b1/a1b087271f7b42d4aca1d641dbea3ef4/FLAG3a792d167 [2018-10-22 15:55:34,568 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:55:34,569 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-10-22 15:55:34,575 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3139410b1/a1b087271f7b42d4aca1d641dbea3ef4/FLAG3a792d167 [2018-10-22 15:55:34,590 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3139410b1/a1b087271f7b42d4aca1d641dbea3ef4 [2018-10-22 15:55:34,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:55:34,604 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:55:34,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:34,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:55:34,609 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:55:34,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e44ec1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34, skipping insertion in model container [2018-10-22 15:55:34,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:55:34,644 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:55:34,830 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:34,836 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:55:34,854 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:34,871 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:55:34,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34 WrapperNode [2018-10-22 15:55:34,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:34,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:34,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:55:34,873 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:55:34,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:34,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:55:34,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:55:34,896 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:55:34,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (1/1) ... [2018-10-22 15:55:34,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:55:34,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:55:34,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:55:34,924 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:55:34,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (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 15:55:35,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:55:35,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:55:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:55:35,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:55:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:55:35,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:55:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:55:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:55:35,331 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:55:35,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:35 BoogieIcfgContainer [2018-10-22 15:55:35,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:55:35,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:55:35,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:55:35,347 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:55:35,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:55:34" (1/3) ... [2018-10-22 15:55:35,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68da350d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:35, skipping insertion in model container [2018-10-22 15:55:35,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:34" (2/3) ... [2018-10-22 15:55:35,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68da350d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:35, skipping insertion in model container [2018-10-22 15:55:35,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:35" (3/3) ... [2018-10-22 15:55:35,359 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-10-22 15:55:35,372 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:55:35,380 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:55:35,400 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:55:35,450 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:55:35,451 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:55:35,451 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:55:35,452 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:55:35,452 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:55:35,452 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:55:35,452 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:55:35,452 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:55:35,453 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:55:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-22 15:55:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:55:35,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:35,480 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:35,482 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:35,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2007171518, now seen corresponding path program 1 times [2018-10-22 15:55:35,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:35,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:35,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:35,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:35,539 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:35,602 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 15:55:35,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:35,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:55:35,605 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:35,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:55:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:55:35,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:55:35,630 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-22 15:55:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:35,654 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-22 15:55:35,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:55:35,656 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 15:55:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:35,666 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:55:35,666 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:55:35,669 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 15:55:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:55:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-22 15:55:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:55:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-22 15:55:35,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-22 15:55:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:35,705 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-22 15:55:35,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:55:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-22 15:55:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:55:35,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:35,707 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:35,707 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:35,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1715017247, now seen corresponding path program 1 times [2018-10-22 15:55:35,708 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:35,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:35,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:35,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:35,710 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:35,842 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 15:55:35,843 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:35,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:55:35,843 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:35,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:55:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:55:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:35,847 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-22 15:55:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:35,936 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-22 15:55:35,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:55:35,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 15:55:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:35,937 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:55:35,938 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 15:55:35,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:55:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 15:55:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 15:55:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:55:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-22 15:55:35,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-10-22 15:55:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:35,945 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-22 15:55:35,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:55:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-22 15:55:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:55:35,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:35,947 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:35,947 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:35,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1428843034, now seen corresponding path program 1 times [2018-10-22 15:55:35,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:35,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:35,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:35,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:35,950 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:36,440 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-22 15:55:36,665 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 15:55:36,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:36,666 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:36,667 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-22 15:55:36,669 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-10-22 15:55:36,721 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:55:36,721 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:55:36,836 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 15:55:37,345 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:55:37,346 INFO L272 AbstractInterpreter]: Visited 15 different actions 204 times. Merged at 6 different actions 114 times. Widened at 1 different actions 15 times. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-10-22 15:55:37,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:37,395 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:55:37,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:37,395 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 15:55:37,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:37,408 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:37,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:37,858 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 15:55:37,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:38,661 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 15:55:38,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:38,684 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:55:38,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:38,703 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:38,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:38,774 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 15:55:38,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:38,819 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 15:55:38,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:38,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 21 [2018-10-22 15:55:38,821 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:38,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:55:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:55:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:55:38,824 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 14 states. [2018-10-22 15:55:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:39,363 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-10-22 15:55:39,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:55:39,364 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-10-22 15:55:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:39,366 INFO L225 Difference]: With dead ends: 45 [2018-10-22 15:55:39,366 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:55:39,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:55:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:55:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-22 15:55:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:55:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-10-22 15:55:39,376 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-10-22 15:55:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:39,377 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-10-22 15:55:39,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:55:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-10-22 15:55:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:55:39,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:39,378 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:39,378 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:39,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:39,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1947322111, now seen corresponding path program 1 times [2018-10-22 15:55:39,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:39,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:39,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:39,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:39,380 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:39,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:39,465 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:39,465 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 15:55:39,466 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-10-22 15:55:39,469 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:55:39,469 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:55:39,474 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 15:55:40,192 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:55:40,193 INFO L272 AbstractInterpreter]: Visited 16 different actions 504 times. Merged at 7 different actions 284 times. Widened at 1 different actions 37 times. Found 38 fixpoints after 2 different actions. Largest state had 7 variables. [2018-10-22 15:55:40,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:40,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:55:40,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,221 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 15:55:40,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:40,234 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:40,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,563 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:55:40,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:40,582 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:40,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:40,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-10-22 15:55:40,631 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:40,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:55:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:55:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:55:40,632 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-10-22 15:55:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:40,697 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-10-22 15:55:40,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:55:40,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-22 15:55:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:40,700 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:55:40,700 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:55:40,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:55:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:55:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-22 15:55:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 15:55:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-22 15:55:40,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2018-10-22 15:55:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:40,707 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-22 15:55:40,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:55:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-22 15:55:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:55:40,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:40,708 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:40,709 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:40,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 994455866, now seen corresponding path program 2 times [2018-10-22 15:55:40,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:40,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:40,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:40,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:40,711 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:55:41,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:41,158 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:41,158 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:55:41,159 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:55:41,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:41,159 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:55:41,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:41,168 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:41,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:41,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:41,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:41,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:42,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:42,073 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:55:42,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:42,093 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:42,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:42,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:42,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:42,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:42,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:42,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 13, 13] total 30 [2018-10-22 15:55:42,233 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:42,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:55:42,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:55:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:55:42,235 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 19 states. [2018-10-22 15:55:42,628 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-22 15:55:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:43,444 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-10-22 15:55:43,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:55:43,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2018-10-22 15:55:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:43,449 INFO L225 Difference]: With dead ends: 50 [2018-10-22 15:55:43,449 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 15:55:43,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:55:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 15:55:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2018-10-22 15:55:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:55:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-22 15:55:43,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2018-10-22 15:55:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:43,458 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-22 15:55:43,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:55:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-22 15:55:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:55:43,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:43,459 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:43,459 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:43,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:43,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1674514236, now seen corresponding path program 2 times [2018-10-22 15:55:43,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:43,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:43,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:55:43,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:43,461 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:43,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:43,549 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:43,549 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:55:43,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:55:43,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:43,550 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:55:43,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:43,562 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:43,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:43,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:43,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:43,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:43,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:43,756 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:55:43,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:43,771 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:43,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:43,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:43,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:43,804 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:43,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:43,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 16 [2018-10-22 15:55:43,850 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:43,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:55:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:55:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:55:43,851 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2018-10-22 15:55:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:43,965 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-10-22 15:55:43,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:55:43,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-10-22 15:55:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:43,967 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:55:43,967 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 15:55:43,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:55:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 15:55:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-22 15:55:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:55:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-10-22 15:55:43,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2018-10-22 15:55:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:43,974 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-10-22 15:55:43,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:55:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-10-22 15:55:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:55:43,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:43,975 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:43,975 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:43,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash 162653665, now seen corresponding path program 3 times [2018-10-22 15:55:43,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:43,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:55:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:43,977 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:44,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:44,180 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:44,181 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:55:44,181 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:55:44,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:44,181 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:55:44,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:55:44,189 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:55:44,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:55:44,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:44,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:44,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:44,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:44,774 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:55:44,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:55:44,790 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:55:44,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:55:44,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:44,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:44,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:44,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:44,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 18 [2018-10-22 15:55:44,901 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:44,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:55:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:55:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:55:44,904 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2018-10-22 15:55:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:45,094 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-22 15:55:45,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:55:45,096 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-22 15:55:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:45,097 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:55:45,097 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:55:45,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:55:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:55:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 15:55:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:55:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-22 15:55:45,103 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2018-10-22 15:55:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:45,103 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-22 15:55:45,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:55:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-22 15:55:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 15:55:45,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:45,105 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:45,105 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:45,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 129265244, now seen corresponding path program 4 times [2018-10-22 15:55:45,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:45,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:45,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:55:45,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:45,107 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:45,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:45,354 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:45,354 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:55:45,355 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:55:45,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:45,355 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:55:45,363 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:55:45,364 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:55:45,383 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:55:45,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:45,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:45,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:45,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:45,744 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:55:45,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:55:45,759 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:55:45,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:55:45,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:45,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:45,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:45,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:45,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-10-22 15:55:45,880 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:45,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:55:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:55:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:55:45,881 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-22 15:55:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:45,984 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-10-22 15:55:45,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:55:45,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-10-22 15:55:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:45,986 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:55:45,986 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:55:45,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:55:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:55:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-10-22 15:55:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:55:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-22 15:55:45,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2018-10-22 15:55:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:45,994 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-22 15:55:45,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:55:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-22 15:55:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 15:55:45,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:45,995 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:45,996 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:45,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1609235137, now seen corresponding path program 5 times [2018-10-22 15:55:45,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:45,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:45,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:55:45,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:45,998 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:55:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:55:46,043 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 15:55:46,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:55:46 BoogieIcfgContainer [2018-10-22 15:55:46,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:55:46,089 INFO L168 Benchmark]: Toolchain (without parser) took 11486.64 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 860.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -728.2 MB). Peak memory consumption was 132.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:46,091 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 15:55:46,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.50 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 15:55:46,092 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.78 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 15:55:46,092 INFO L168 Benchmark]: Boogie Preprocessor took 26.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:46,093 INFO L168 Benchmark]: RCFGBuilder took 409.10 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -773.7 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:46,094 INFO L168 Benchmark]: TraceAbstraction took 10755.02 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 139.5 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 35.0 MB). Peak memory consumption was 174.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:46,098 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 267.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.78 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 26.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 409.10 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 721.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -773.7 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10755.02 ms. Allocated memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: 139.5 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 35.0 MB). Peak memory consumption was 174.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i