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/sum04_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:59:57,560 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:59:57,562 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:59:57,577 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:59:57,577 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:59:57,578 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:59:57,580 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:59:57,581 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:59:57,583 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:59:57,584 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:59:57,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:59:57,585 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:59:57,586 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:59:57,587 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:59:57,588 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:59:57,589 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:59:57,590 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:59:57,592 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:59:57,594 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:59:57,595 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:59:57,597 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:59:57,598 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:59:57,600 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:59:57,601 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:59:57,601 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:59:57,602 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:59:57,603 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:59:57,604 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:59:57,605 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:59:57,607 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:59:57,608 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:59:57,608 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:59:57,609 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:59:57,609 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:59:57,610 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:59:57,611 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:59:57,611 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 15:59:57,645 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:59:57,646 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:59:57,649 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:59:57,649 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:59:57,649 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:59:57,650 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:59:57,650 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:59:57,650 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:59:57,650 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 15:59:57,650 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:59:57,651 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:59:57,651 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:59:57,652 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:59:57,653 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:59:57,653 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:59:57,653 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:59:57,653 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:59:57,653 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:59:57,655 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:59:57,655 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:59:57,656 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:59:57,656 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:59:57,656 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:59:57,656 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:59:57,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:59:57,657 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:59:57,657 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:59:57,657 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:59:57,657 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:59:57,658 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:59:57,658 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:59:57,658 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:59:57,658 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:59:57,658 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 15:59:57,736 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:59:57,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:59:57,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:59:57,763 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:59:57,763 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:59:57,764 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-22 15:59:57,824 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7ec5474d4/7582955309644b11ba0708be0dc73ec9/FLAGea445b931 [2018-10-22 15:59:58,343 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:59:58,343 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-22 15:59:58,350 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7ec5474d4/7582955309644b11ba0708be0dc73ec9/FLAGea445b931 [2018-10-22 15:59:58,364 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7ec5474d4/7582955309644b11ba0708be0dc73ec9 [2018-10-22 15:59:58,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:59:58,377 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:59:58,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:59:58,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:59:58,382 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:59:58,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd08af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58, skipping insertion in model container [2018-10-22 15:59:58,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:59:58,419 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:59:58,594 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:59:58,597 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:59:58,611 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:59:58,627 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:59:58,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58 WrapperNode [2018-10-22 15:59:58,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:59:58,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:59:58,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:59:58,629 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:59:58,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:59:58,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:59:58,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:59:58,653 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:59:58,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (1/1) ... [2018-10-22 15:59:58,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:59:58,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:59:58,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:59:58,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:59:58,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (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 15:59:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:59:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:59:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:59:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:59:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:59:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:59:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:59:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:59:59,016 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:59:59,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:59:59 BoogieIcfgContainer [2018-10-22 15:59:59,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:59:59,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:59:59,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:59:59,022 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:59:59,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:59:58" (1/3) ... [2018-10-22 15:59:59,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cedd0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:59:59, skipping insertion in model container [2018-10-22 15:59:59,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:59:58" (2/3) ... [2018-10-22 15:59:59,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cedd0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:59:59, skipping insertion in model container [2018-10-22 15:59:59,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:59:59" (3/3) ... [2018-10-22 15:59:59,026 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_true-unreach-call_true-termination.i [2018-10-22 15:59:59,036 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:59:59,044 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:59:59,058 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:59:59,091 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:59:59,092 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:59:59,092 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:59:59,092 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:59:59,092 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:59:59,092 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:59:59,093 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:59:59,093 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:59:59,093 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:59:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-22 15:59:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:59:59,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:59,119 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:59,122 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:59,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:59,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1870586046, now seen corresponding path program 1 times [2018-10-22 15:59:59,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:59,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:59,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:59,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:59,189 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:59,247 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 15:59:59,249 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:59:59,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:59:59,250 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:59:59,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:59:59,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:59:59,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:59:59,274 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-22 15:59:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:59:59,298 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-22 15:59:59,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:59:59,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 15:59:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:59:59,309 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:59:59,309 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 15:59:59,313 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 15:59:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 15:59:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-22 15:59:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:59:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-22 15:59:59,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-22 15:59:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:59:59,351 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-22 15:59:59,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:59:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-22 15:59:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:59:59,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:59,352 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:59,352 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:59,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1861068280, now seen corresponding path program 1 times [2018-10-22 15:59:59,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:59,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:59,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:59,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:59,355 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:59,447 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 15:59:59,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:59:59,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:59:59,448 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:59:59,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:59:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:59:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:59:59,451 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-10-22 15:59:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:59:59,544 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 15:59:59,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:59:59,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 15:59:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:59:59,560 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:59:59,560 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:59:59,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:59:59,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:59:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-22 15:59:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:59:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-22 15:59:59,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-10-22 15:59:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:59:59,570 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-22 15:59:59,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:59:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-22 15:59:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:59:59,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:59:59,572 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:59:59,572 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:59:59,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:59:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash 996352094, now seen corresponding path program 1 times [2018-10-22 15:59:59,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:59:59,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:59,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:59:59,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:59:59,581 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:59:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:59:59,760 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 15:59:59,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:59:59,760 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:59:59,761 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-10-22 15:59:59,763 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [21], [24], [26], [32], [33], [34], [36] [2018-10-22 15:59:59,833 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:59:59,833 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:00:00,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:00:00,125 INFO L272 AbstractInterpreter]: Visited 13 different actions 61 times. Merged at 4 different actions 30 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-22 16:00:00,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:00,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:00:00,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:00,139 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:00:00,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:00,150 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:00:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:00,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:00,312 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 16:00:00,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:00,331 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:00:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:00,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:00,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-10-22 16:00:00,392 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:00,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 16:00:00,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 16:00:00,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 16:00:00,393 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-10-22 16:00:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:00,483 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-22 16:00:00,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 16:00:00,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-22 16:00:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:00,485 INFO L225 Difference]: With dead ends: 24 [2018-10-22 16:00:00,485 INFO L226 Difference]: Without dead ends: 19 [2018-10-22 16:00:00,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 16:00:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-22 16:00:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-10-22 16:00:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 16:00:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 16:00:00,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-10-22 16:00:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:00,491 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 16:00:00,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 16:00:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 16:00:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 16:00:00,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:00,493 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:00,493 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:00,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1450296376, now seen corresponding path program 2 times [2018-10-22 16:00:00,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:00,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:00,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:00,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:00,495 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:00,579 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:00,579 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:00,579 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:00,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:00,580 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:00:00,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:00:00,595 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:00:00,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:00:00,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:00,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:00,946 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 16:00:00,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:00:00,962 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:00:00,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:00:00,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:00,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:00,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:01,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-10-22 16:00:01,025 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:01,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 16:00:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 16:00:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 16:00:01,027 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-22 16:00:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:01,074 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 16:00:01,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 16:00:01,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-22 16:00:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:01,075 INFO L225 Difference]: With dead ends: 27 [2018-10-22 16:00:01,076 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 16:00:01,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 16:00:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 16:00:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-22 16:00:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 16:00:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-22 16:00:01,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-10-22 16:00:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:01,082 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-22 16:00:01,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 16:00:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-22 16:00:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 16:00:01,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:01,083 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:01,083 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:01,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 52386334, now seen corresponding path program 3 times [2018-10-22 16:00:01,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:01,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:01,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:00:01,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:01,085 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:01,211 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:01,211 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:01,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:01,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:01,212 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 16:00:01,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:00:01,223 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:00:01,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 16:00:01,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:01,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:01,471 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 16:00:01,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:00:01,488 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:00:01,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 16:00:01,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:01,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:01,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-10-22 16:00:01,557 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:01,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:00:01,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:00:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:01,559 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2018-10-22 16:00:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:01,609 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-22 16:00:01,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 16:00:01,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-10-22 16:00:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:01,612 INFO L225 Difference]: With dead ends: 30 [2018-10-22 16:00:01,612 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 16:00:01,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 16:00:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-10-22 16:00:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 16:00:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-22 16:00:01,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2018-10-22 16:00:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:01,620 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-22 16:00:01,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:00:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-22 16:00:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 16:00:01,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:01,621 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:01,621 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:01,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1082772872, now seen corresponding path program 4 times [2018-10-22 16:00:01,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:01,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:01,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:00:01,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:01,623 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:01,723 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:01,723 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:01,723 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:01,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:01,724 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 16:00:01,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 16:00:01,738 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 16:00:01,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 16:00:01,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:01,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:01,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:02,124 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 16:00:02,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 16:00:02,156 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 16:00:02,171 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 16:00:02,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:02,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:02,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 10 [2018-10-22 16:00:02,255 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:02,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:00:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:00:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:02,257 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2018-10-22 16:00:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:02,307 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-22 16:00:02,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:00:02,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-22 16:00:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:02,310 INFO L225 Difference]: With dead ends: 33 [2018-10-22 16:00:02,311 INFO L226 Difference]: Without dead ends: 28 [2018-10-22 16:00:02,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-22 16:00:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-22 16:00:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 16:00:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-22 16:00:02,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2018-10-22 16:00:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:02,316 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-22 16:00:02,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:00:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-22 16:00:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 16:00:02,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:02,318 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:02,318 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:02,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash -38190114, now seen corresponding path program 5 times [2018-10-22 16:00:02,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:02,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:02,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:00:02,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:02,320 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:02,431 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:02,431 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:02,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:02,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:02,432 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 16:00:02,450 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 16:00:02,450 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:00:02,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 16:00:02,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:02,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,480 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:02,652 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 16:00:02,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 16:00:02,669 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:00:02,704 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 16:00:02,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:02,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,715 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:02,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 10 [2018-10-22 16:00:02,785 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:02,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 16:00:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 16:00:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:02,786 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-10-22 16:00:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:02,843 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-22 16:00:02,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 16:00:02,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-22 16:00:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:02,845 INFO L225 Difference]: With dead ends: 36 [2018-10-22 16:00:02,845 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 16:00:02,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 16:00:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-10-22 16:00:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 16:00:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-22 16:00:02,850 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-10-22 16:00:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:02,850 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-22 16:00:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 16:00:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-22 16:00:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 16:00:02,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:02,852 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:02,852 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:02,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2088693944, now seen corresponding path program 6 times [2018-10-22 16:00:02,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:02,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:00:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:02,854 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:02,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:02,974 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:02,975 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:02,975 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:02,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:02,975 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 16:00:02,984 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 16:00:02,984 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 16:00:02,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 16:00:02,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:03,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:03,171 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 16:00:03,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 16:00:03,186 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 16:00:03,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 16:00:03,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:03,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:03,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 10 [2018-10-22 16:00:03,380 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:03,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 16:00:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 16:00:03,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:03,381 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 9 states. [2018-10-22 16:00:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:03,439 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-22 16:00:03,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 16:00:03,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-10-22 16:00:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:03,443 INFO L225 Difference]: With dead ends: 39 [2018-10-22 16:00:03,443 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 16:00:03,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 16:00:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-22 16:00:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 16:00:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-22 16:00:03,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2018-10-22 16:00:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:03,450 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-22 16:00:03,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 16:00:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-22 16:00:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 16:00:03,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:03,452 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:03,452 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:03,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:03,452 INFO L82 PathProgramCache]: Analyzing trace with hash 439147934, now seen corresponding path program 7 times [2018-10-22 16:00:03,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:03,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:00:03,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:03,454 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:03,706 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:03,706 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:03,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:03,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:03,706 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:00:03,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:03,716 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:00:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:03,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:03,886 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:00:03,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:03,903 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:00:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:03,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:03,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:04,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:04,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 10 [2018-10-22 16:00:04,013 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:04,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 16:00:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 16:00:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:04,015 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 10 states. [2018-10-22 16:00:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:04,076 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-22 16:00:04,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 16:00:04,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2018-10-22 16:00:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:04,084 INFO L225 Difference]: With dead ends: 41 [2018-10-22 16:00:04,084 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 16:00:04,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:00:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 16:00:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-22 16:00:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 16:00:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-22 16:00:04,090 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2018-10-22 16:00:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:04,090 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-22 16:00:04,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 16:00:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-22 16:00:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 16:00:04,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:04,092 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:04,092 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:04,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:04,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1829764856, now seen corresponding path program 8 times [2018-10-22 16:00:04,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:04,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:04,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:00:04,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:04,094 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:04,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:04,351 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:00:04,351 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:00:04,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:00:04,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:04,351 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:00:04,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:00:04,367 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:00:04,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:00:04,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:04,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:04,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:04,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:00:04,813 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:00:04,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:00:04,828 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:00:04,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:00:04,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:00:04,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:00:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:05,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:00:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:05,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:00:05,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-10-22 16:00:05,080 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:00:05,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 16:00:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 16:00:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2018-10-22 16:00:05,081 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2018-10-22 16:00:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:05,432 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-22 16:00:05,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 16:00:05,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-10-22 16:00:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:05,433 INFO L225 Difference]: With dead ends: 44 [2018-10-22 16:00:05,433 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 16:00:05,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2018-10-22 16:00:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 16:00:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-22 16:00:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 16:00:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-22 16:00:05,439 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2018-10-22 16:00:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:05,440 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-22 16:00:05,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 16:00:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-22 16:00:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 16:00:05,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:00:05,441 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:00:05,441 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:00:05,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:00:05,442 INFO L82 PathProgramCache]: Analyzing trace with hash 443950942, now seen corresponding path program 9 times [2018-10-22 16:00:05,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:00:05,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:05,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:00:05,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:00:05,443 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:00:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:00:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:00:05,591 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:00:05,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-22 16:00:05,591 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:00:05,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 16:00:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 16:00:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:00:05,593 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-10-22 16:00:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:00:05,644 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-22 16:00:05,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 16:00:05,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-22 16:00:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:00:05,650 INFO L225 Difference]: With dead ends: 39 [2018-10-22 16:00:05,650 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 16:00:05,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:00:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 16:00:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 16:00:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 16:00:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 16:00:05,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-10-22 16:00:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:00:05,653 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 16:00:05,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 16:00:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 16:00:05,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 16:00:05,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 16:00:05,812 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 16:00:05,812 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:00:05,813 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:00:05,813 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 16:00:05,813 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 16:00:05,813 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 16:00:05,813 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-10-22 16:00:05,813 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-10-22 16:00:05,813 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2018-10-22 16:00:05,814 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2018-10-22 16:00:05,814 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2018-10-22 16:00:05,814 INFO L421 ceAbstractionStarter]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 7 main_~i~0) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= main_~i~0 7)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0))) [2018-10-22 16:00:05,815 INFO L421 ceAbstractionStarter]: At program point L13-5(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2018-10-22 16:00:05,815 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 16:00:05,815 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 16:00:05,815 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 16:00:05,815 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 16:00:05,815 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 16:00:05,816 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 16:00:05,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:00:05 BoogieIcfgContainer [2018-10-22 16:00:05,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:00:05,833 INFO L168 Benchmark]: Toolchain (without parser) took 7457.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -231.3 MB). Peak memory consumption was 501.1 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:05,836 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. [2018-10-22 16:00:05,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:05,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:00:05,838 INFO L168 Benchmark]: Boogie Preprocessor took 23.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:00:05,838 INFO L168 Benchmark]: RCFGBuilder took 340.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -775.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:05,839 INFO L168 Benchmark]: TraceAbstraction took 6814.51 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 533.3 MB). Peak memory consumption was 533.3 MB. Max. memory is 7.1 GB. [2018-10-22 16:00:05,844 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 250.79 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 23.18 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 23.40 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 340.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -775.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6814.51 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 533.3 MB). Peak memory consumption was 533.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && 6 <= i) && i <= 6) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((7 <= i && 12 <= sn) && sn <= 12) && i <= 7)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 6.7s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 147 SDtfs, 37 SDslu, 594 SDs, 0 SdLazy, 277 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 847 GetRequests, 720 SyntacticMatches, 44 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 647 NumberOfCodeBlocks, 645 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 996 ConstructedInterpolants, 0 QuantifiedInterpolants, 83058 SizeOfPredicates, 16 NumberOfNonLiveVariables, 824 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 43 InterpolantComputations, 3 PerfectInterpolantSequences, 126/1746 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...