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-EXP.epf -i ../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:23:59,023 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:23:59,025 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:23:59,037 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:23:59,037 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:23:59,038 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:23:59,040 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:23:59,041 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:23:59,043 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:23:59,044 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:23:59,045 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:23:59,045 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:23:59,046 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:23:59,047 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:23:59,049 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:23:59,049 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:23:59,050 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:23:59,052 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:23:59,054 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:23:59,056 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:23:59,057 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:23:59,058 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:23:59,061 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:23:59,061 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:23:59,061 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:23:59,062 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:23:59,063 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:23:59,064 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:23:59,065 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:23:59,066 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:23:59,066 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:23:59,067 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 12:23:59,069 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:23:59,085 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:23:59,086 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:23:59,086 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:23:59,087 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:23:59,087 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:23:59,087 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:23:59,087 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:23:59,087 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:23:59,088 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:23:59,088 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:23:59,088 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:23:59,088 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:23:59,088 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:23:59,088 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:23:59,089 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:23:59,089 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:23:59,090 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:23:59,090 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:23:59,090 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:23:59,090 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:23:59,090 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:23:59,091 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:23:59,091 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:23:59,091 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:23:59,091 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:23:59,091 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:23:59,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:23:59,092 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:23:59,092 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:23:59,092 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:23:59,092 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:23:59,093 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:23:59,093 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:23:59,093 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:23:59,093 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:23:59,093 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:23:59,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:23:59,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:23:59,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:23:59,155 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:23:59,155 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:23:59,156 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-10-24 12:23:59,217 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/444dd4d6a/78feaec8e7c3497da4e5944f56189cec/FLAG5abb8484c [2018-10-24 12:23:59,629 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:23:59,629 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-10-24 12:23:59,635 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/444dd4d6a/78feaec8e7c3497da4e5944f56189cec/FLAG5abb8484c [2018-10-24 12:23:59,650 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/444dd4d6a/78feaec8e7c3497da4e5944f56189cec [2018-10-24 12:23:59,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:23:59,663 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:23:59,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:23:59,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:23:59,669 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:23:59,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5f6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59, skipping insertion in model container [2018-10-24 12:23:59,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:23:59,706 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:23:59,893 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:23:59,897 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:23:59,915 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:23:59,931 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:23:59,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59 WrapperNode [2018-10-24 12:23:59,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:23:59,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:23:59,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:23:59,933 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:23:59,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:23:59,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:23:59,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:23:59,956 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:23:59,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (1/1) ... [2018-10-24 12:23:59,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:23:59,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:23:59,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:23:59,979 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:23:59,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (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 [2018-10-24 12:24:00,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:24:00,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:24:00,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:24:00,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:24:00,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:24:00,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:24:00,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:24:00,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:24:00,326 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:24:00,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:24:00 BoogieIcfgContainer [2018-10-24 12:24:00,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:24:00,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:24:00,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:24:00,331 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:24:00,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:23:59" (1/3) ... [2018-10-24 12:24:00,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cc47b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:24:00, skipping insertion in model container [2018-10-24 12:24:00,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:59" (2/3) ... [2018-10-24 12:24:00,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cc47b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:24:00, skipping insertion in model container [2018-10-24 12:24:00,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:24:00" (3/3) ... [2018-10-24 12:24:00,335 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-10-24 12:24:00,345 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:24:00,353 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:24:00,370 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:24:00,405 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:24:00,405 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:24:00,405 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:24:00,405 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:24:00,405 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:24:00,406 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:24:00,406 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:24:00,406 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:24:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-24 12:24:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 12:24:00,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:00,432 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:00,434 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:00,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-10-24 12:24:00,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:00,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:00,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:00,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:00,502 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:00,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:00,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:24:00,565 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:00,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:24:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:24:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:24:00,590 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-24 12:24:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:00,614 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-24 12:24:00,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:24:00,615 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-24 12:24:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:00,624 INFO L225 Difference]: With dead ends: 31 [2018-10-24 12:24:00,624 INFO L226 Difference]: Without dead ends: 14 [2018-10-24 12:24:00,628 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 [2018-10-24 12:24:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-24 12:24:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-24 12:24:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 12:24:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-24 12:24:00,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-24 12:24:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:00,665 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-24 12:24:00,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:24:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-24 12:24:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:24:00,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:00,666 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:00,667 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:00,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:00,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-10-24 12:24:00,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:00,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:00,669 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:00,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:00,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:24:00,749 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:00,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:24:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:24:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:24:00,753 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-10-24 12:24:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:00,880 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-10-24 12:24:00,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:24:00,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-24 12:24:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:00,882 INFO L225 Difference]: With dead ends: 27 [2018-10-24 12:24:00,882 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 12:24:00,883 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 [2018-10-24 12:24:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 12:24:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-24 12:24:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 12:24:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-24 12:24:00,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-24 12:24:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:00,889 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-24 12:24:00,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:24:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-24 12:24:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 12:24:00,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:00,891 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:00,891 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:00,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-10-24 12:24:00,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:00,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:00,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:00,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:00,893 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:00,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:00,957 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:00,958 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-24 12:24:00,960 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-24 12:24:00,994 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:00,995 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:01,236 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:24:01,238 INFO L272 AbstractInterpreter]: Visited 14 different actions 33 times. Merged at 4 different actions 15 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 3 variables. [2018-10-24 12:24:01,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:01,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:24:01,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:01,281 INFO L194 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 [2018-10-24 12:24:01,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:01,300 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:01,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:01,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:01,630 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:24:01,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2018-10-24 12:24:01,630 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:01,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 12:24:01,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 12:24:01,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:24:01,632 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-10-24 12:24:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:01,732 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-24 12:24:01,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:24:01,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-24 12:24:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:01,734 INFO L225 Difference]: With dead ends: 27 [2018-10-24 12:24:01,734 INFO L226 Difference]: Without dead ends: 22 [2018-10-24 12:24:01,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:24:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-24 12:24:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-10-24 12:24:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 12:24:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-24 12:24:01,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2018-10-24 12:24:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:01,741 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-24 12:24:01,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 12:24:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-24 12:24:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 12:24:01,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:01,742 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:01,743 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:01,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1335432365, now seen corresponding path program 1 times [2018-10-24 12:24:01,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:01,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:01,745 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:01,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:01,856 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:01,856 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-24 12:24:01,857 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-24 12:24:01,858 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:01,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:01,917 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:24:01,917 INFO L272 AbstractInterpreter]: Visited 15 different actions 40 times. Merged at 5 different actions 17 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 4 different actions. Largest state had 3 variables. [2018-10-24 12:24:01,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:01,933 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:24:01,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:01,934 INFO L194 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 [2018-10-24 12:24:01,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:01,943 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:01,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:01,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:02,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:02,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-10-24 12:24:02,219 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:02,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 12:24:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 12:24:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:24:02,220 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-10-24 12:24:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:02,265 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-10-24 12:24:02,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:24:02,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-10-24 12:24:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:02,266 INFO L225 Difference]: With dead ends: 37 [2018-10-24 12:24:02,266 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 12:24:02,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:24:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 12:24:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-10-24 12:24:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 12:24:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-24 12:24:02,272 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-10-24 12:24:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:02,273 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-24 12:24:02,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 12:24:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-24 12:24:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 12:24:02,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:02,274 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:02,274 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:02,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1612548918, now seen corresponding path program 2 times [2018-10-24 12:24:02,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:02,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:02,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:02,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:02,346 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:02,346 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:24:02,346 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:02,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:02,346 INFO L194 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 [2018-10-24 12:24:02,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:24:02,362 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:24:02,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:24:02,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:24:02,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 12:24:02,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 12:24:02,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:02,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-10-24 12:24:02,667 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:02,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 12:24:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 12:24:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:24:02,669 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2018-10-24 12:24:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:02,734 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2018-10-24 12:24:02,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:24:02,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-24 12:24:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:02,738 INFO L225 Difference]: With dead ends: 46 [2018-10-24 12:24:02,738 INFO L226 Difference]: Without dead ends: 34 [2018-10-24 12:24:02,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:24:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-24 12:24:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-10-24 12:24:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 12:24:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-24 12:24:02,746 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2018-10-24 12:24:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:02,746 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-24 12:24:02,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 12:24:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-24 12:24:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 12:24:02,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:02,748 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:02,748 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:02,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:02,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1421000070, now seen corresponding path program 3 times [2018-10-24 12:24:02,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:02,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:02,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:24:02,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:02,750 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:02,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:02,862 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:02,862 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:24:02,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:02,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:02,863 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:02,879 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:24:02,879 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:24:02,896 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:24:02,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:24:02,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:03,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:03,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:03,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2018-10-24 12:24:03,447 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:03,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 12:24:03,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 12:24:03,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:24:03,449 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2018-10-24 12:24:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:03,532 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2018-10-24 12:24:03,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 12:24:03,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2018-10-24 12:24:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:03,535 INFO L225 Difference]: With dead ends: 49 [2018-10-24 12:24:03,535 INFO L226 Difference]: Without dead ends: 44 [2018-10-24 12:24:03,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:24:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-24 12:24:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-24 12:24:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 12:24:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-24 12:24:03,543 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 31 [2018-10-24 12:24:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:03,544 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-24 12:24:03,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 12:24:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-24 12:24:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 12:24:03,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:03,545 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:03,546 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:03,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash 940069211, now seen corresponding path program 4 times [2018-10-24 12:24:03,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:03,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:03,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:24:03,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:03,548 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 12:24:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 12:24:03,604 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-24 12:24:03,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:24:03 BoogieIcfgContainer [2018-10-24 12:24:03,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:24:03,637 INFO L168 Benchmark]: Toolchain (without parser) took 3974.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -619.8 MB). Peak memory consumption was 135.2 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:03,639 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:24:03,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.27 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. [2018-10-24 12:24:03,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.10 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. [2018-10-24 12:24:03,641 INFO L168 Benchmark]: Boogie Preprocessor took 22.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:24:03,641 INFO L168 Benchmark]: RCFGBuilder took 347.56 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.2 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:03,642 INFO L168 Benchmark]: TraceAbstraction took 3308.40 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 174.8 MB). Peak memory consumption was 174.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:24:03,647 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 23.10 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 22.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 347.56 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.2 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3308.40 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 174.8 MB). Peak memory consumption was 174.8 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, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.2s OverallTime, 7 OverallIterations, 9 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 78 SDtfs, 51 SDslu, 122 SDs, 0 SdLazy, 90 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 240 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 11725 SizeOfPredicates, 6 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 85/234 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...