java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1_false-unreach-call_false-termination_true-no-overflow.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:24:08,927 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:24:08,930 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:24:08,948 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:24:08,948 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:24:08,950 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:24:08,951 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:24:08,954 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:24:08,956 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:24:08,958 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:24:08,959 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:24:08,959 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:24:08,962 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:24:08,963 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:24:08,966 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:24:08,974 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:24:08,975 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:24:08,978 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:24:08,981 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:24:08,982 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:24:08,985 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:24:08,987 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:24:08,991 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 23:24:08,991 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 23:24:08,992 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 23:24:08,993 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 23:24:08,995 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 23:24:08,996 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 23:24:08,996 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 23:24:08,997 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 23:24:08,999 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 23:24:09,000 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 23:24:09,005 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf [2018-07-23 23:24:09,020 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:24:09,020 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:24:09,021 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:24:09,021 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-23 23:24:09,021 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-23 23:24:09,022 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-23 23:24:09,022 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-23 23:24:09,022 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-23 23:24:09,022 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-23 23:24:09,022 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-23 23:24:09,023 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-23 23:24:09,023 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:24:09,024 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:24:09,024 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:24:09,024 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:24:09,024 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:24:09,024 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:24:09,024 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:24:09,025 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:24:09,025 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:24:09,025 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:24:09,025 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:24:09,025 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:24:09,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:24:09,026 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:24:09,026 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:24:09,026 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:24:09,026 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-23 23:24:09,027 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:24:09,027 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:24:09,027 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:24:09,027 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:24:09,027 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-23 23:24:09,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:24:09,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:24:09,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:24:09,098 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:24:09,099 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:24:09,099 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1_false-unreach-call_false-termination_true-no-overflow.c [2018-07-23 23:24:09,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec33ce59/171d70b8d7a942a98bdede59f0cee8a8/FLAG6b9faab24 [2018-07-23 23:24:09,628 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:24:09,629 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1_false-unreach-call_false-termination_true-no-overflow.c [2018-07-23 23:24:09,644 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec33ce59/171d70b8d7a942a98bdede59f0cee8a8/FLAG6b9faab24 [2018-07-23 23:24:09,662 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec33ce59/171d70b8d7a942a98bdede59f0cee8a8 [2018-07-23 23:24:09,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:24:09,675 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:24:09,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:24:09,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:24:09,684 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:24:09,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:24:09" (1/1) ... [2018-07-23 23:24:09,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6728ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:09, skipping insertion in model container [2018-07-23 23:24:09,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:24:09" (1/1) ... [2018-07-23 23:24:09,869 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:24:10,095 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:24:10,116 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:24:10,225 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:24:10,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10 WrapperNode [2018-07-23 23:24:10,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:24:10,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:24:10,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:24:10,268 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:24:10,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:24:10,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:24:10,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:24:10,303 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:24:10,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... [2018-07-23 23:24:10,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:24:10,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:24:10,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:24:10,359 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:24:10,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:24:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-23 23:24:10,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-23 23:24:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:24:10,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:24:10,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 23:24:10,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 23:24:12,042 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:24:12,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:24:12 BoogieIcfgContainer [2018-07-23 23:24:12,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:24:12,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:24:12,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:24:12,049 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:24:12,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:24:09" (1/3) ... [2018-07-23 23:24:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16855aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:24:12, skipping insertion in model container [2018-07-23 23:24:12,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:24:10" (2/3) ... [2018-07-23 23:24:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16855aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:24:12, skipping insertion in model container [2018-07-23 23:24:12,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:24:12" (3/3) ... [2018-07-23 23:24:12,052 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1_false-unreach-call_false-termination_true-no-overflow.c [2018-07-23 23:24:12,061 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:24:12,074 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:24:12,137 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:24:12,138 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:24:12,138 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:24:12,139 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:24:12,139 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:24:12,139 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:24:12,139 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:24:12,139 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:24:12,140 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:24:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2018-07-23 23:24:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 23:24:12,172 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:12,174 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:12,174 INFO L414 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -662778961, now seen corresponding path program 1 times [2018-07-23 23:24:12,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:12,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:12,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:12,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:12,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:12,389 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:24:12,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:24:12,389 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:12,394 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:12,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:12,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:12,409 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2018-07-23 23:24:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:13,372 INFO L93 Difference]: Finished difference Result 331 states and 635 transitions. [2018-07-23 23:24:13,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:13,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-07-23 23:24:13,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:13,390 INFO L225 Difference]: With dead ends: 331 [2018-07-23 23:24:13,390 INFO L226 Difference]: Without dead ends: 206 [2018-07-23 23:24:13,395 INFO L573 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 [2018-07-23 23:24:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-07-23 23:24:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 182. [2018-07-23 23:24:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 23:24:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 314 transitions. [2018-07-23 23:24:13,456 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 314 transitions. Word has length 14 [2018-07-23 23:24:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:13,456 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 314 transitions. [2018-07-23 23:24:13,456 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 314 transitions. [2018-07-23 23:24:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 23:24:13,458 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:13,458 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:13,458 INFO L414 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:13,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1058783719, now seen corresponding path program 1 times [2018-07-23 23:24:13,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:13,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:13,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:13,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:13,461 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:13,529 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:24:13,530 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:24:13,530 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:13,532 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:13,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:13,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:13,533 INFO L87 Difference]: Start difference. First operand 182 states and 314 transitions. Second operand 3 states. [2018-07-23 23:24:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:13,620 INFO L93 Difference]: Finished difference Result 365 states and 632 transitions. [2018-07-23 23:24:13,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:13,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-07-23 23:24:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:13,628 INFO L225 Difference]: With dead ends: 365 [2018-07-23 23:24:13,629 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 23:24:13,631 INFO L573 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 [2018-07-23 23:24:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 23:24:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 23:24:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 23:24:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 322 transitions. [2018-07-23 23:24:13,652 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 322 transitions. Word has length 15 [2018-07-23 23:24:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:13,654 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 322 transitions. [2018-07-23 23:24:13,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 322 transitions. [2018-07-23 23:24:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 23:24:13,655 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:13,656 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:13,656 INFO L414 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash -426524154, now seen corresponding path program 1 times [2018-07-23 23:24:13,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:13,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:13,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:13,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:13,658 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:13,906 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:24:13,906 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:24:13,906 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:13,907 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:13,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:13,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:13,908 INFO L87 Difference]: Start difference. First operand 189 states and 322 transitions. Second operand 3 states. [2018-07-23 23:24:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:14,507 INFO L93 Difference]: Finished difference Result 290 states and 484 transitions. [2018-07-23 23:24:14,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:14,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2018-07-23 23:24:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:14,515 INFO L225 Difference]: With dead ends: 290 [2018-07-23 23:24:14,515 INFO L226 Difference]: Without dead ends: 274 [2018-07-23 23:24:14,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-07-23 23:24:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2018-07-23 23:24:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-07-23 23:24:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 436 transitions. [2018-07-23 23:24:14,543 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 436 transitions. Word has length 21 [2018-07-23 23:24:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:14,543 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 436 transitions. [2018-07-23 23:24:14,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 436 transitions. [2018-07-23 23:24:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:24:14,545 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:14,545 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:14,545 INFO L414 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1881066880, now seen corresponding path program 1 times [2018-07-23 23:24:14,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:14,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:14,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:14,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:14,547 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:14,635 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:24:14,635 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:24:14,635 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:14,636 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:14,636 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:14,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:14,637 INFO L87 Difference]: Start difference. First operand 259 states and 436 transitions. Second operand 3 states. [2018-07-23 23:24:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:14,740 INFO L93 Difference]: Finished difference Result 468 states and 791 transitions. [2018-07-23 23:24:14,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:14,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-07-23 23:24:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:14,743 INFO L225 Difference]: With dead ends: 468 [2018-07-23 23:24:14,743 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 23:24:14,746 INFO L573 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 [2018-07-23 23:24:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 23:24:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2018-07-23 23:24:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-23 23:24:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 355 transitions. [2018-07-23 23:24:14,759 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 355 transitions. Word has length 22 [2018-07-23 23:24:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:14,759 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 355 transitions. [2018-07-23 23:24:14,759 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 355 transitions. [2018-07-23 23:24:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 23:24:14,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:14,761 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:14,762 INFO L414 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:14,762 INFO L82 PathProgramCache]: Analyzing trace with hash 30525515, now seen corresponding path program 1 times [2018-07-23 23:24:14,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:14,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:14,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:14,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:14,764 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:14,900 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:14,901 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:24:14,901 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-07-23 23:24:14,903 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [18], [20], [24], [27], [30], [35], [42], [45], [48], [51], [54], [56], [526], [529], [530], [531] [2018-07-23 23:24:14,954 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:24:14,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:24:15,760 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:24:18,338 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:24:18,340 INFO L272 AbstractInterpreter]: Visited 21 different actions 46 times. Merged at 13 different actions 19 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 38 variables. [2018-07-23 23:24:18,391 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:24:18,391 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:18,391 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:24:18,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:18,405 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:24:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:18,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:24:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-23 23:24:18,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:24:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-23 23:24:18,614 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-23 23:24:18,614 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-07-23 23:24:18,614 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:18,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:18,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:18,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:24:18,615 INFO L87 Difference]: Start difference. First operand 214 states and 355 transitions. Second operand 3 states. [2018-07-23 23:24:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:18,692 INFO L93 Difference]: Finished difference Result 389 states and 646 transitions. [2018-07-23 23:24:18,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:18,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-07-23 23:24:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:18,694 INFO L225 Difference]: With dead ends: 389 [2018-07-23 23:24:18,694 INFO L226 Difference]: Without dead ends: 182 [2018-07-23 23:24:18,695 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:24:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-23 23:24:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2018-07-23 23:24:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 23:24:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 291 transitions. [2018-07-23 23:24:18,704 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 291 transitions. Word has length 28 [2018-07-23 23:24:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:18,704 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 291 transitions. [2018-07-23 23:24:18,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 291 transitions. [2018-07-23 23:24:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 23:24:18,706 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:18,706 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:18,706 INFO L414 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:18,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1381236108, now seen corresponding path program 1 times [2018-07-23 23:24:18,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:18,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:18,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:18,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:18,708 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:18,796 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:18,796 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:24:18,796 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-07-23 23:24:18,797 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [18], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [239], [242], [245], [526], [529], [530], [531] [2018-07-23 23:24:18,799 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:24:18,800 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:24:19,057 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:24:20,680 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-23 23:24:20,681 INFO L272 AbstractInterpreter]: Visited 25 different actions 55 times. Merged at 16 different actions 22 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 39 variables. [2018-07-23 23:24:20,686 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-23 23:24:21,445 INFO L232 lantSequenceWeakener]: Weakened 28 states. On average, predicates are now at 91.12% of their original sizes. [2018-07-23 23:24:21,445 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-23 23:24:22,105 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-23 23:24:22,106 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-23 23:24:22,107 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2018-07-23 23:24:22,107 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:22,108 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:24:22,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:24:22,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:24:22,109 INFO L87 Difference]: Start difference. First operand 180 states and 291 transitions. Second operand 14 states. [2018-07-23 23:24:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:35,302 INFO L93 Difference]: Finished difference Result 375 states and 610 transitions. [2018-07-23 23:24:35,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:24:35,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2018-07-23 23:24:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:35,306 INFO L225 Difference]: With dead ends: 375 [2018-07-23 23:24:35,306 INFO L226 Difference]: Without dead ends: 220 [2018-07-23 23:24:35,307 INFO L573 BasicCegarLoop]: 2 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:24:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-23 23:24:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2018-07-23 23:24:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-23 23:24:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 338 transitions. [2018-07-23 23:24:35,329 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 338 transitions. Word has length 30 [2018-07-23 23:24:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:35,330 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 338 transitions. [2018-07-23 23:24:35,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:24:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 338 transitions. [2018-07-23 23:24:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:24:35,335 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:35,335 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:35,335 INFO L414 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1339641340, now seen corresponding path program 1 times [2018-07-23 23:24:35,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:35,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:35,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:35,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:35,338 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:24:35,460 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:24:35,460 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:24:35,461 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:35,461 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:35,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:35,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:35,462 INFO L87 Difference]: Start difference. First operand 217 states and 338 transitions. Second operand 3 states. [2018-07-23 23:24:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:35,911 INFO L93 Difference]: Finished difference Result 391 states and 620 transitions. [2018-07-23 23:24:35,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:35,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2018-07-23 23:24:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:35,914 INFO L225 Difference]: With dead ends: 391 [2018-07-23 23:24:35,914 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 23:24:35,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 23:24:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2018-07-23 23:24:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 23:24:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 341 transitions. [2018-07-23 23:24:35,924 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 341 transitions. Word has length 40 [2018-07-23 23:24:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:35,924 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 341 transitions. [2018-07-23 23:24:35,924 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 341 transitions. [2018-07-23 23:24:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:24:35,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:35,926 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:35,926 INFO L414 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:35,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2019699710, now seen corresponding path program 1 times [2018-07-23 23:24:35,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:35,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:35,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:35,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:35,928 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:24:36,024 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:24:36,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:24:36,024 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:24:36,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:24:36,024 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:24:36,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:24:36,025 INFO L87 Difference]: Start difference. First operand 221 states and 341 transitions. Second operand 3 states. [2018-07-23 23:24:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:36,314 INFO L93 Difference]: Finished difference Result 395 states and 619 transitions. [2018-07-23 23:24:36,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:24:36,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2018-07-23 23:24:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:36,316 INFO L225 Difference]: With dead ends: 395 [2018-07-23 23:24:36,316 INFO L226 Difference]: Without dead ends: 223 [2018-07-23 23:24:36,317 INFO L573 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 [2018-07-23 23:24:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-07-23 23:24:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2018-07-23 23:24:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 23:24:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 339 transitions. [2018-07-23 23:24:36,327 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 339 transitions. Word has length 40 [2018-07-23 23:24:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:36,328 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 339 transitions. [2018-07-23 23:24:36,328 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:24:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 339 transitions. [2018-07-23 23:24:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 23:24:36,329 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:36,329 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:36,329 INFO L414 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:36,332 INFO L82 PathProgramCache]: Analyzing trace with hash 937434793, now seen corresponding path program 1 times [2018-07-23 23:24:36,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:36,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:36,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:36,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:36,333 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:36,703 WARN L169 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-07-23 23:24:37,002 WARN L169 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-07-23 23:24:37,621 WARN L169 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2018-07-23 23:24:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-07-23 23:24:37,627 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:37,627 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:24:37,627 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-07-23 23:24:37,627 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [335], [338], [341], [526], [529], [530], [531] [2018-07-23 23:24:37,630 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:24:37,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:24:37,938 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:24:44,031 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:24:44,032 INFO L272 AbstractInterpreter]: Visited 31 different actions 145 times. Merged at 24 different actions 96 times. Widened at 2 different actions 4 times. Found 17 fixpoints after 6 different actions. Largest state had 41 variables. [2018-07-23 23:24:44,069 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:24:44,069 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:44,069 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:24:44,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:44,085 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:24:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:44,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:24:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:24:44,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:24:44,432 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-07-23 23:24:44,893 WARN L169 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 6 [2018-07-23 23:24:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:24:45,146 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:45,147 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:24:45,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:45,174 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:24:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:45,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:24:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:24:45,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:24:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:24:45,522 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:24:45,522 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 10 [2018-07-23 23:24:45,523 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:24:45,523 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:24:45,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:24:45,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:24:45,524 INFO L87 Difference]: Start difference. First operand 221 states and 339 transitions. Second operand 7 states. [2018-07-23 23:24:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:47,297 INFO L93 Difference]: Finished difference Result 474 states and 733 transitions. [2018-07-23 23:24:47,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:24:47,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-07-23 23:24:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:47,301 INFO L225 Difference]: With dead ends: 474 [2018-07-23 23:24:47,301 INFO L226 Difference]: Without dead ends: 292 [2018-07-23 23:24:47,302 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:24:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-07-23 23:24:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 272. [2018-07-23 23:24:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-07-23 23:24:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 419 transitions. [2018-07-23 23:24:47,316 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 419 transitions. Word has length 41 [2018-07-23 23:24:47,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:47,316 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 419 transitions. [2018-07-23 23:24:47,316 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:24:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 419 transitions. [2018-07-23 23:24:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 23:24:47,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:47,317 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:47,318 INFO L414 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:47,318 INFO L82 PathProgramCache]: Analyzing trace with hash -992845957, now seen corresponding path program 1 times [2018-07-23 23:24:47,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:47,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:47,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:47,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:47,319 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 23:24:47,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:47,424 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:24:47,425 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-07-23 23:24:47,425 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [347], [350], [353], [356], [526], [529], [530], [531] [2018-07-23 23:24:47,427 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:24:47,427 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:24:47,643 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:24:51,360 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:24:51,360 INFO L272 AbstractInterpreter]: Visited 32 different actions 147 times. Merged at 25 different actions 95 times. Widened at 2 different actions 4 times. Found 17 fixpoints after 6 different actions. Largest state had 42 variables. [2018-07-23 23:24:51,367 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:24:51,368 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:51,368 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:24:51,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:51,376 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:24:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:51,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:24:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 23:24:51,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:24:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 23:24:51,593 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:51,593 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:24:51,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:51,610 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:24:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:51,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:24:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 23:24:51,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:24:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 23:24:51,741 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:24:51,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 4 [2018-07-23 23:24:51,742 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:24:51,742 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 23:24:51,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 23:24:51,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:24:51,743 INFO L87 Difference]: Start difference. First operand 272 states and 419 transitions. Second operand 4 states. [2018-07-23 23:24:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:24:52,404 INFO L93 Difference]: Finished difference Result 446 states and 695 transitions. [2018-07-23 23:24:52,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 23:24:52,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-07-23 23:24:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:24:52,409 INFO L225 Difference]: With dead ends: 446 [2018-07-23 23:24:52,409 INFO L226 Difference]: Without dead ends: 424 [2018-07-23 23:24:52,409 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:24:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2018-07-23 23:24:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 422. [2018-07-23 23:24:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2018-07-23 23:24:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 636 transitions. [2018-07-23 23:24:52,429 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 636 transitions. Word has length 42 [2018-07-23 23:24:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:24:52,430 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 636 transitions. [2018-07-23 23:24:52,430 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 23:24:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 636 transitions. [2018-07-23 23:24:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 23:24:52,431 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:24:52,431 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:24:52,431 INFO L414 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:24:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash -275920596, now seen corresponding path program 1 times [2018-07-23 23:24:52,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:24:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:52,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:24:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:24:52,432 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:24:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:24:52,672 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-23 23:24:52,841 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-23 23:24:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:24:52,965 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:24:52,965 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:24:52,965 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-07-23 23:24:52,965 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [347], [362], [377], [380], [383], [386], [526], [529], [530], [531] [2018-07-23 23:24:52,968 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:24:52,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:24:53,160 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:25:01,023 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:25:01,023 INFO L272 AbstractInterpreter]: Visited 34 different actions 157 times. Merged at 27 different actions 105 times. Widened at 2 different actions 4 times. Found 17 fixpoints after 6 different actions. Largest state had 44 variables. [2018-07-23 23:25:01,032 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:25:01,033 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:01,033 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:25:01,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:01,041 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:01,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:01,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:01,354 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 20 [2018-07-23 23:25:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:01,758 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:01,758 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:25:01,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:01,776 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:01,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:01,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:02,222 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:25:02,223 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-07-23 23:25:02,223 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:25:02,223 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:25:02,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:25:02,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:25:02,224 INFO L87 Difference]: Start difference. First operand 422 states and 636 transitions. Second operand 5 states. [2018-07-23 23:25:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:25:03,035 INFO L93 Difference]: Finished difference Result 431 states and 643 transitions. [2018-07-23 23:25:03,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:25:03,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2018-07-23 23:25:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:25:03,038 INFO L225 Difference]: With dead ends: 431 [2018-07-23 23:25:03,038 INFO L226 Difference]: Without dead ends: 429 [2018-07-23 23:25:03,039 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 168 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:25:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2018-07-23 23:25:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2018-07-23 23:25:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-07-23 23:25:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 637 transitions. [2018-07-23 23:25:03,056 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 637 transitions. Word has length 44 [2018-07-23 23:25:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:25:03,056 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 637 transitions. [2018-07-23 23:25:03,056 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:25:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 637 transitions. [2018-07-23 23:25:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 23:25:03,057 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:25:03,057 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:25:03,057 INFO L414 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:25:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash 161633879, now seen corresponding path program 1 times [2018-07-23 23:25:03,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:25:03,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:03,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:03,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:03,059 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:25:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:25:03,131 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:25:03,131 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:25:03,131 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:25:03,132 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:25:03,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:25:03,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:25:03,133 INFO L87 Difference]: Start difference. First operand 423 states and 637 transitions. Second operand 3 states. [2018-07-23 23:25:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:25:03,235 INFO L93 Difference]: Finished difference Result 795 states and 1193 transitions. [2018-07-23 23:25:03,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:25:03,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-07-23 23:25:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:25:03,238 INFO L225 Difference]: With dead ends: 795 [2018-07-23 23:25:03,239 INFO L226 Difference]: Without dead ends: 421 [2018-07-23 23:25:03,240 INFO L573 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 [2018-07-23 23:25:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-07-23 23:25:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 399. [2018-07-23 23:25:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-07-23 23:25:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 584 transitions. [2018-07-23 23:25:03,258 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 584 transitions. Word has length 45 [2018-07-23 23:25:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:25:03,258 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 584 transitions. [2018-07-23 23:25:03,258 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:25:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 584 transitions. [2018-07-23 23:25:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 23:25:03,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:25:03,259 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:25:03,259 INFO L414 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:25:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1614817955, now seen corresponding path program 1 times [2018-07-23 23:25:03,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:25:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:03,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:03,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:03,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:25:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-07-23 23:25:03,346 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:25:03,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:25:03,346 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 23:25:03,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:25:03,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:25:03,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:25:03,348 INFO L87 Difference]: Start difference. First operand 399 states and 584 transitions. Second operand 3 states. [2018-07-23 23:25:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:25:03,543 INFO L93 Difference]: Finished difference Result 555 states and 812 transitions. [2018-07-23 23:25:03,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:25:03,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2018-07-23 23:25:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:25:03,545 INFO L225 Difference]: With dead ends: 555 [2018-07-23 23:25:03,545 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 23:25:03,546 INFO L573 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 [2018-07-23 23:25:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 23:25:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2018-07-23 23:25:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-07-23 23:25:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 316 transitions. [2018-07-23 23:25:03,557 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 316 transitions. Word has length 55 [2018-07-23 23:25:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:25:03,557 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 316 transitions. [2018-07-23 23:25:03,557 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:25:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 316 transitions. [2018-07-23 23:25:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:25:03,558 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:25:03,558 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:25:03,558 INFO L414 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:25:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1860919614, now seen corresponding path program 1 times [2018-07-23 23:25:03,559 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:25:03,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:03,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:03,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:03,560 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:25:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:03,699 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:03,699 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:25:03,699 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-07-23 23:25:03,700 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [18], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [347], [362], [377], [380], [383], [388], [425], [428], [443], [446], [449], [452], [526], [529], [530], [531] [2018-07-23 23:25:03,702 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:25:03,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:25:03,892 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:25:17,191 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:25:17,191 INFO L272 AbstractInterpreter]: Visited 41 different actions 233 times. Merged at 33 different actions 152 times. Widened at 3 different actions 6 times. Found 27 fixpoints after 8 different actions. Largest state had 46 variables. [2018-07-23 23:25:17,198 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:25:17,198 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:17,199 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:25:17,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:17,220 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:17,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:17,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:17,470 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:17,471 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:25:17,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:17,486 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:17,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:17,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:17,653 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:25:17,653 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-07-23 23:25:17,654 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:25:17,654 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:25:17,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:25:17,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:25:17,655 INFO L87 Difference]: Start difference. First operand 223 states and 316 transitions. Second operand 5 states. [2018-07-23 23:25:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:25:17,915 INFO L93 Difference]: Finished difference Result 597 states and 858 transitions. [2018-07-23 23:25:17,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:25:17,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2018-07-23 23:25:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:25:17,918 INFO L225 Difference]: With dead ends: 597 [2018-07-23 23:25:17,919 INFO L226 Difference]: Without dead ends: 442 [2018-07-23 23:25:17,920 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:25:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2018-07-23 23:25:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 326. [2018-07-23 23:25:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-07-23 23:25:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 472 transitions. [2018-07-23 23:25:17,936 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 472 transitions. Word has length 56 [2018-07-23 23:25:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:25:17,937 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 472 transitions. [2018-07-23 23:25:17,937 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:25:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 472 transitions. [2018-07-23 23:25:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 23:25:17,937 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:25:17,937 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:25:17,938 INFO L414 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:25:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2119085052, now seen corresponding path program 1 times [2018-07-23 23:25:17,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:25:17,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:17,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:17,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:17,939 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:25:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:18,136 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:18,136 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:25:18,136 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-07-23 23:25:18,136 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [347], [362], [377], [380], [383], [388], [425], [428], [443], [446], [449], [452], [526], [529], [530], [531] [2018-07-23 23:25:18,138 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:25:18,138 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:25:18,368 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:25:28,372 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:25:28,373 INFO L272 AbstractInterpreter]: Visited 40 different actions 222 times. Merged at 33 different actions 152 times. Widened at 3 different actions 6 times. Found 27 fixpoints after 8 different actions. Largest state had 46 variables. [2018-07-23 23:25:28,381 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:25:28,381 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:28,382 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:25:28,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:28,390 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:28,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:28,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:25:28,611 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:28,611 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:25:28,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:28,640 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:28,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:25:28,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:25:28,865 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:25:28,865 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 5, 4] total 7 [2018-07-23 23:25:28,865 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:25:28,866 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:25:28,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:25:28,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:25:28,867 INFO L87 Difference]: Start difference. First operand 326 states and 472 transitions. Second operand 5 states. [2018-07-23 23:25:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:25:29,065 INFO L93 Difference]: Finished difference Result 373 states and 538 transitions. [2018-07-23 23:25:29,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:25:29,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2018-07-23 23:25:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:25:29,068 INFO L225 Difference]: With dead ends: 373 [2018-07-23 23:25:29,068 INFO L226 Difference]: Without dead ends: 367 [2018-07-23 23:25:29,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:25:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-07-23 23:25:29,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2018-07-23 23:25:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-07-23 23:25:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 526 transitions. [2018-07-23 23:25:29,085 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 526 transitions. Word has length 56 [2018-07-23 23:25:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:25:29,086 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 526 transitions. [2018-07-23 23:25:29,086 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:25:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 526 transitions. [2018-07-23 23:25:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 23:25:29,086 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:25:29,086 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:25:29,087 INFO L414 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:25:29,087 INFO L82 PathProgramCache]: Analyzing trace with hash 807144158, now seen corresponding path program 1 times [2018-07-23 23:25:29,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:25:29,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:29,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:29,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:29,088 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:25:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:29,953 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:29,953 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:25:29,953 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 61 with the following transitions: [2018-07-23 23:25:29,954 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [347], [362], [377], [380], [383], [388], [425], [428], [443], [458], [473], [488], [503], [506], [509], [512], [526], [529], [530], [531] [2018-07-23 23:25:29,956 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:25:29,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:25:30,157 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:25:41,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:25:41,079 INFO L272 AbstractInterpreter]: Visited 44 different actions 242 times. Merged at 37 different actions 168 times. Widened at 3 different actions 6 times. Found 27 fixpoints after 8 different actions. Largest state had 50 variables. [2018-07-23 23:25:41,086 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:25:41,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:41,087 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:25:41,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:41,098 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:41,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:41,246 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:41,476 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:41,476 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:25:41,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:41,495 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:25:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:41,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:25:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:41,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:25:42,299 WARN L169 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2018-07-23 23:25:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:42,602 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:25:42,602 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 7] total 19 [2018-07-23 23:25:42,602 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:25:42,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 23:25:42,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 23:25:42,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:25:42,603 INFO L87 Difference]: Start difference. First operand 364 states and 526 transitions. Second operand 10 states. [2018-07-23 23:25:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:25:42,887 INFO L93 Difference]: Finished difference Result 367 states and 528 transitions. [2018-07-23 23:25:42,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:25:42,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2018-07-23 23:25:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:25:42,896 INFO L225 Difference]: With dead ends: 367 [2018-07-23 23:25:42,896 INFO L226 Difference]: Without dead ends: 365 [2018-07-23 23:25:42,897 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:25:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-07-23 23:25:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2018-07-23 23:25:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-07-23 23:25:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 525 transitions. [2018-07-23 23:25:42,916 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 525 transitions. Word has length 60 [2018-07-23 23:25:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:25:42,916 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 525 transitions. [2018-07-23 23:25:42,916 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 23:25:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 525 transitions. [2018-07-23 23:25:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 23:25:42,917 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:25:42,917 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:25:42,917 INFO L414 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:25:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash -743255307, now seen corresponding path program 1 times [2018-07-23 23:25:42,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:25:42,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:42,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:25:42,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:25:42,919 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:25:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:25:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:25:43,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:25:43,231 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:25:43,231 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2018-07-23 23:25:43,231 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [54], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [347], [362], [377], [380], [383], [388], [425], [428], [443], [458], [473], [488], [503], [506], [509], [514], [526], [529], [530], [531] [2018-07-23 23:25:43,233 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:25:43,233 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:25:43,421 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:26:21,920 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:26:21,920 INFO L272 AbstractInterpreter]: Visited 45 different actions 782 times. Merged at 38 different actions 632 times. Widened at 5 different actions 42 times. Found 104 fixpoints after 13 different actions. Largest state had 50 variables. [2018-07-23 23:26:21,929 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:26:21,929 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:26:21,930 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:26:21,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:26:21,940 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:26:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:26:22,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:26:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:26:22,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:26:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:26:22,532 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:26:22,532 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:26:22,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:26:22,548 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:26:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:26:22,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:26:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:26:22,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:26:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-23 23:26:22,854 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:26:22,855 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 8, 7] total 14 [2018-07-23 23:26:22,855 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:26:22,855 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:26:22,855 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:26:22,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:26:22,856 INFO L87 Difference]: Start difference. First operand 364 states and 525 transitions. Second operand 9 states. [2018-07-23 23:26:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:26:23,199 INFO L93 Difference]: Finished difference Result 368 states and 529 transitions. [2018-07-23 23:26:23,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:26:23,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2018-07-23 23:26:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:26:23,202 INFO L225 Difference]: With dead ends: 368 [2018-07-23 23:26:23,202 INFO L226 Difference]: Without dead ends: 366 [2018-07-23 23:26:23,203 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:26:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-07-23 23:26:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2018-07-23 23:26:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-07-23 23:26:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2018-07-23 23:26:23,220 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 67 [2018-07-23 23:26:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:26:23,220 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2018-07-23 23:26:23,220 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:26:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2018-07-23 23:26:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 23:26:23,221 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:26:23,221 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:26:23,221 INFO L414 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:26:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1746386041, now seen corresponding path program 1 times [2018-07-23 23:26:23,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:26:23,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:26:23,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:26:23,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:26:23,223 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:26:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:26:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:26:23,574 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:26:23,574 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:26:23,574 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 78 with the following transitions: [2018-07-23 23:26:23,574 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [18], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [260], [262], [329], [332], [347], [362], [377], [380], [383], [388], [425], [428], [443], [458], [473], [488], [503], [506], [509], [514], [526], [529], [530], [531] [2018-07-23 23:26:23,576 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:26:23,576 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:26:23,897 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:27:07,928 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:27:07,928 INFO L272 AbstractInterpreter]: Visited 46 different actions 947 times. Merged at 39 different actions 738 times. Widened at 5 different actions 48 times. Found 128 fixpoints after 16 different actions. Largest state had 50 variables. [2018-07-23 23:27:07,938 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:27:07,938 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:27:07,939 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:27:07,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:27:07,946 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:27:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:27:08,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:27:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:27:08,020 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:27:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:27:08,156 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:27:08,156 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:27:08,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:27:08,187 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:27:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:27:08,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:27:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:27:08,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:27:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:27:08,421 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:27:08,421 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-23 23:27:08,421 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:27:08,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 23:27:08,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 23:27:08,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:27:08,422 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2018-07-23 23:27:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:27:09,432 INFO L93 Difference]: Finished difference Result 825 states and 1192 transitions. [2018-07-23 23:27:09,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:27:09,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2018-07-23 23:27:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:27:09,437 INFO L225 Difference]: With dead ends: 825 [2018-07-23 23:27:09,437 INFO L226 Difference]: Without dead ends: 568 [2018-07-23 23:27:09,437 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:27:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2018-07-23 23:27:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 446. [2018-07-23 23:27:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2018-07-23 23:27:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 649 transitions. [2018-07-23 23:27:09,457 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 649 transitions. Word has length 77 [2018-07-23 23:27:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:27:09,457 INFO L471 AbstractCegarLoop]: Abstraction has 446 states and 649 transitions. [2018-07-23 23:27:09,457 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 23:27:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 649 transitions. [2018-07-23 23:27:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 23:27:09,458 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:27:09,458 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:27:09,458 INFO L414 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:27:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2139413051, now seen corresponding path program 1 times [2018-07-23 23:27:09,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:27:09,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:27:09,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:27:09,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:27:09,459 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:27:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:27:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:27:09,652 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:27:09,652 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:27:09,653 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 78 with the following transitions: [2018-07-23 23:27:09,653 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [260], [262], [329], [332], [347], [362], [377], [380], [383], [388], [425], [428], [443], [458], [473], [488], [503], [506], [509], [514], [526], [529], [530], [531] [2018-07-23 23:27:09,654 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:27:09,655 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:27:09,817 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 23:27:43,947 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 23:27:43,947 INFO L272 AbstractInterpreter]: Visited 45 different actions 787 times. Merged at 38 different actions 636 times. Widened at 5 different actions 44 times. Found 104 fixpoints after 13 different actions. Largest state had 50 variables. [2018-07-23 23:27:43,960 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 23:27:43,961 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:27:43,961 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:27:43,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:27:43,968 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:27:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:27:44,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:27:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-23 23:27:44,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:27:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 35 proven. 43 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-23 23:27:44,284 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:27:44,285 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 23:27:44,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:27:44,305 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:27:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:27:44,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:27:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:27:44,515 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 23:27:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:27:44,600 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 23:27:44,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6, 8, 7] total 21 [2018-07-23 23:27:44,600 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 23:27:44,601 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:27:44,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:27:44,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:27:44,601 INFO L87 Difference]: Start difference. First operand 446 states and 649 transitions. Second operand 12 states. [2018-07-23 23:27:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:27:44,914 INFO L93 Difference]: Finished difference Result 472 states and 685 transitions. [2018-07-23 23:27:44,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:27:44,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2018-07-23 23:27:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:27:44,918 INFO L225 Difference]: With dead ends: 472 [2018-07-23 23:27:44,918 INFO L226 Difference]: Without dead ends: 468 [2018-07-23 23:27:44,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:27:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2018-07-23 23:27:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2018-07-23 23:27:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2018-07-23 23:27:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 679 transitions. [2018-07-23 23:27:44,936 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 679 transitions. Word has length 77 [2018-07-23 23:27:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:27:44,937 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 679 transitions. [2018-07-23 23:27:44,937 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:27:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 679 transitions. [2018-07-23 23:27:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 23:27:44,938 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:27:44,938 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:27:44,938 INFO L414 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:27:44,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1314627048, now seen corresponding path program 1 times [2018-07-23 23:27:44,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 23:27:44,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:27:44,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:27:44,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:27:44,939 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 23:27:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:27:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 99 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-23 23:27:45,159 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:27:45,159 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 23:27:45,159 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 88 with the following transitions: [2018-07-23 23:27:45,160 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [20], [24], [27], [30], [35], [42], [45], [48], [51], [56], [138], [233], [236], [251], [254], [257], [262], [329], [332], [335], [338], [341], [347], [362], [377], [380], [383], [388], [425], [428], [443], [458], [473], [488], [503], [506], [509], [514], [526], [529], [530], [531] [2018-07-23 23:27:45,161 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 23:27:45,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 23:27:45,353 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-07-23 23:28:04,944 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-07-23 23:28:04,945 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-07-23 23:28:04,945 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-23 23:28:04,945 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:28:04,945 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:28:04,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:28:04,956 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 23:28:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:28:05,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:28:05,030 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-23 23:28:05,231 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:28:05,231 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 23:28:05,236 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 23:28:05,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:28:05 BoogieIcfgContainer [2018-07-23 23:28:05,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:28:05,237 INFO L168 Benchmark]: Toolchain (without parser) took 235563.85 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -1.9 GB). Peak memory consumption was 749.7 MB. Max. memory is 7.1 GB. [2018-07-23 23:28:05,238 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-07-23 23:28:05,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.82 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-23 23:28:05,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.19 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. [2018-07-23 23:28:05,240 INFO L168 Benchmark]: Boogie Preprocessor took 56.31 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. [2018-07-23 23:28:05,240 INFO L168 Benchmark]: RCFGBuilder took 1685.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -756.0 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. [2018-07-23 23:28:05,241 INFO L168 Benchmark]: TraceAbstraction took 233191.61 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 2.0 GB). Free memory was 2.2 GB in the beginning and 3.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 741.1 MB. Max. memory is 7.1 GB. [2018-07-23 23:28:05,245 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 591.82 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.19 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 56.31 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 1685.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -756.0 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233191.61 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 2.0 GB). Free memory was 2.2 GB in the beginning and 3.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 741.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 569]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 569). Cancelled while BasicCegarLoop was analyzing trace of length 88 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 8 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 115 locations, 1 error locations. TIMEOUT Result, 233.1s OverallTime, 20 OverallIterations, 8 TraceHistogramMax, 21.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3077 SDtfs, 2601 SDslu, 6221 SDs, 0 SdLazy, 1874 SolverSat, 239 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.5s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 2250 GetRequests, 2095 SyntacticMatches, 38 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=468occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 195.8s AbstIntTime, 12 AbstIntIterations, 1 AbstIntStrong, 0.949160035366932 AbsIntWeakeningRatio, 1.5517241379310345 AbsIntAvgWeakeningVarsNumRemoved, 593.7931034482758 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 345 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 1898 NumberOfCodeBlocks, 1898 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2909 ConstructedInterpolants, 164 QuantifiedInterpolants, 1100339 SizeOfPredicates, 50 NumberOfNonLiveVariables, 6839 ConjunctsInSsa, 226 ConjunctsInUnsatCore, 57 InterpolantComputations, 10 PerfectInterpolantSequences, 1126/2466 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_false-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-Taipan_Default-old.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-28-05-257.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_false-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-Taipan_Default-old.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-28-05-257.csv Completed graceful shutdown