java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_cnstr_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:42:30,932 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:42:30,934 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:42:30,949 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:42:30,949 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:42:30,950 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:42:30,951 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:42:30,953 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:42:30,954 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:42:30,955 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:42:30,956 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:42:30,956 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:42:30,956 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:42:30,957 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:42:30,958 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:42:30,961 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:42:30,963 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:42:30,965 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:42:30,966 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:42:30,967 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:42:30,970 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 23:42:30,974 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:42:30,975 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:42:30,975 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:42:30,985 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:42:30,986 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:42:30,986 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:42:30,987 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:42:30,987 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:42:30,987 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:42:30,987 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:42:30,987 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:42:30,988 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:42:30,988 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:42:30,988 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:42:30,989 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:42:30,989 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:42:30,989 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:42:30,989 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:42:30,989 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:42:30,990 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:42:30,990 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:42:30,990 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:42:30,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:42:30,990 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:42:30,991 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:42:30,991 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:42:30,991 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:42:30,991 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:42:30,992 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:42:30,992 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:42:30,992 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:42:30,992 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:42:30,992 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:42:30,992 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:42:30,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:42:30,993 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:42:30,993 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:42:30,994 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:42:30,994 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:42:31,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:42:31,042 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:42:31,045 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:42:31,046 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:42:31,046 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:42:31,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_cnstr_true-valid-memsafety_false-termination.i [2018-01-24 23:42:31,209 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:42:31,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:42:31,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:42:31,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:42:31,223 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:42:31,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb77e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31, skipping insertion in model container [2018-01-24 23:42:31,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,246 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:42:31,285 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:42:31,391 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:42:31,407 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:42:31,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31 WrapperNode [2018-01-24 23:42:31,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:42:31,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:42:31,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:42:31,416 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:42:31,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... [2018-01-24 23:42:31,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:42:31,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:42:31,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:42:31,453 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:42:31,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (1/1) ... No working directory specified, using /storage/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 [2018-01-24 23:42:31,494 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:42:31,494 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:42:31,494 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:42:31,495 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:42:31,495 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:42:31,495 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:42:31,495 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:42:31,495 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:42:31,495 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:42:31,496 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:42:31,496 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:42:31,496 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:42:31,496 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:42:31,496 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:42:31,963 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:42:31,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:42:31 BoogieIcfgContainer [2018-01-24 23:42:31,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:42:31,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:42:31,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:42:31,967 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:42:31,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:42:31" (1/3) ... [2018-01-24 23:42:31,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2056e250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:42:31, skipping insertion in model container [2018-01-24 23:42:31,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:42:31" (2/3) ... [2018-01-24 23:42:31,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2056e250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:42:31, skipping insertion in model container [2018-01-24 23:42:31,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:42:31" (3/3) ... [2018-01-24 23:42:31,971 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_cnstr_true-valid-memsafety_false-termination.i [2018-01-24 23:42:31,977 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:42:31,984 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 55 error locations. [2018-01-24 23:42:32,020 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:42:32,020 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:42:32,021 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:42:32,021 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:42:32,021 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:42:32,021 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:42:32,021 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:42:32,021 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:42:32,022 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:42:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2018-01-24 23:42:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 23:42:32,043 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:32,044 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:32,044 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1341839433, now seen corresponding path program 1 times [2018-01-24 23:42:32,050 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:32,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:32,087 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:32,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:32,088 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:32,124 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:32,175 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:32,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:42:32,175 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:32,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:42:32,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:42:32,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:42:32,189 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 4 states. [2018-01-24 23:42:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:32,568 INFO L93 Difference]: Finished difference Result 293 states and 335 transitions. [2018-01-24 23:42:32,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:42:32,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 23:42:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:32,580 INFO L225 Difference]: With dead ends: 293 [2018-01-24 23:42:32,580 INFO L226 Difference]: Without dead ends: 170 [2018-01-24 23:42:32,584 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-01-24 23:42:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2018-01-24 23:42:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-24 23:42:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2018-01-24 23:42:32,626 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 8 [2018-01-24 23:42:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:32,626 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2018-01-24 23:42:32,626 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:42:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2018-01-24 23:42:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 23:42:32,627 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:32,627 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:32,627 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1341839434, now seen corresponding path program 1 times [2018-01-24 23:42:32,627 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:32,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:32,628 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:32,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:32,628 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:32,648 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:32,732 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:32,732 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:42:32,732 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:32,734 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:42:32,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:42:32,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:42:32,736 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 4 states. [2018-01-24 23:42:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:32,995 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2018-01-24 23:42:32,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:42:32,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 23:42:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:32,999 INFO L225 Difference]: With dead ends: 167 [2018-01-24 23:42:33,000 INFO L226 Difference]: Without dead ends: 165 [2018-01-24 23:42:33,001 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-24 23:42:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2018-01-24 23:42:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-24 23:42:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2018-01-24 23:42:33,014 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 8 [2018-01-24 23:42:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,015 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2018-01-24 23:42:33,015 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:42:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2018-01-24 23:42:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:42:33,016 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,016 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,016 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash 557054198, now seen corresponding path program 1 times [2018-01-24 23:42:33,016 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,018 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,018 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,018 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:33,034 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:33,081 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:33,081 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:42:33,082 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:33,082 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:42:33,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:42:33,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:42:33,083 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 4 states. [2018-01-24 23:42:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:33,231 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2018-01-24 23:42:33,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:42:33,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 23:42:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:33,232 INFO L225 Difference]: With dead ends: 172 [2018-01-24 23:42:33,233 INFO L226 Difference]: Without dead ends: 154 [2018-01-24 23:42:33,233 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-24 23:42:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2018-01-24 23:42:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-01-24 23:42:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2018-01-24 23:42:33,244 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 14 [2018-01-24 23:42:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,245 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2018-01-24 23:42:33,245 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:42:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2018-01-24 23:42:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:42:33,245 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,245 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,245 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash 557054199, now seen corresponding path program 1 times [2018-01-24 23:42:33,246 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,247 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,247 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,247 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,247 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:33,262 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:33,323 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:33,323 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:42:33,323 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:33,324 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:42:33,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:42:33,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:33,324 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 5 states. [2018-01-24 23:42:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:33,619 INFO L93 Difference]: Finished difference Result 251 states and 285 transitions. [2018-01-24 23:42:33,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:42:33,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:42:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:33,621 INFO L225 Difference]: With dead ends: 251 [2018-01-24 23:42:33,621 INFO L226 Difference]: Without dead ends: 233 [2018-01-24 23:42:33,622 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:42:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-01-24 23:42:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 182. [2018-01-24 23:42:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-01-24 23:42:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 240 transitions. [2018-01-24 23:42:33,641 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 240 transitions. Word has length 14 [2018-01-24 23:42:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,641 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 240 transitions. [2018-01-24 23:42:33,641 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:42:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 240 transitions. [2018-01-24 23:42:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 23:42:33,642 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,642 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,642 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash -505191267, now seen corresponding path program 1 times [2018-01-24 23:42:33,643 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,644 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,644 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:33,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:33,698 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:33,698 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:42:33,698 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:33,699 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:42:33,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:42:33,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:42:33,699 INFO L87 Difference]: Start difference. First operand 182 states and 240 transitions. Second operand 4 states. [2018-01-24 23:42:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:33,724 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2018-01-24 23:42:33,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:42:33,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-24 23:42:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:33,727 INFO L225 Difference]: With dead ends: 198 [2018-01-24 23:42:33,727 INFO L226 Difference]: Without dead ends: 195 [2018-01-24 23:42:33,727 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-01-24 23:42:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 182. [2018-01-24 23:42:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-01-24 23:42:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2018-01-24 23:42:33,741 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 17 [2018-01-24 23:42:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,741 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2018-01-24 23:42:33,741 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:42:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2018-01-24 23:42:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:42:33,742 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,742 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,743 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash -605576120, now seen corresponding path program 1 times [2018-01-24 23:42:33,743 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,744 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,744 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:33,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:33,781 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:33,781 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:42:33,781 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:33,781 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:42:33,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:42:33,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:42:33,782 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand 3 states. [2018-01-24 23:42:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:33,798 INFO L93 Difference]: Finished difference Result 261 states and 355 transitions. [2018-01-24 23:42:33,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:42:33,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-01-24 23:42:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:33,800 INFO L225 Difference]: With dead ends: 261 [2018-01-24 23:42:33,800 INFO L226 Difference]: Without dead ends: 185 [2018-01-24 23:42:33,801 INFO L525 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 [2018-01-24 23:42:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-01-24 23:42:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-01-24 23:42:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-01-24 23:42:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 241 transitions. [2018-01-24 23:42:33,811 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 241 transitions. Word has length 22 [2018-01-24 23:42:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,811 INFO L432 AbstractCegarLoop]: Abstraction has 185 states and 241 transitions. [2018-01-24 23:42:33,812 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:42:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 241 transitions. [2018-01-24 23:42:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:42:33,813 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,813 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,813 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 927704743, now seen corresponding path program 1 times [2018-01-24 23:42:33,813 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,814 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,814 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,814 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,815 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:33,824 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:33,845 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:33,845 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:42:33,845 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:33,846 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:42:33,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:42:33,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:42:33,846 INFO L87 Difference]: Start difference. First operand 185 states and 241 transitions. Second operand 3 states. [2018-01-24 23:42:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:33,864 INFO L93 Difference]: Finished difference Result 363 states and 477 transitions. [2018-01-24 23:42:33,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:42:33,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-01-24 23:42:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:33,873 INFO L225 Difference]: With dead ends: 363 [2018-01-24 23:42:33,873 INFO L226 Difference]: Without dead ends: 187 [2018-01-24 23:42:33,874 INFO L525 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 [2018-01-24 23:42:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-01-24 23:42:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-01-24 23:42:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-24 23:42:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 243 transitions. [2018-01-24 23:42:33,885 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 243 transitions. Word has length 22 [2018-01-24 23:42:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,886 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 243 transitions. [2018-01-24 23:42:33,886 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:42:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 243 transitions. [2018-01-24 23:42:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:42:33,887 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,887 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,887 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2088156413, now seen corresponding path program 1 times [2018-01-24 23:42:33,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,889 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:33,902 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:33,935 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:33,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:42:33,936 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:33,936 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:42:33,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:42:33,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:42:33,937 INFO L87 Difference]: Start difference. First operand 187 states and 243 transitions. Second operand 3 states. [2018-01-24 23:42:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:33,972 INFO L93 Difference]: Finished difference Result 280 states and 367 transitions. [2018-01-24 23:42:33,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:42:33,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-01-24 23:42:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:33,975 INFO L225 Difference]: With dead ends: 280 [2018-01-24 23:42:33,975 INFO L226 Difference]: Without dead ends: 201 [2018-01-24 23:42:33,976 INFO L525 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 [2018-01-24 23:42:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-01-24 23:42:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 190. [2018-01-24 23:42:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-24 23:42:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 243 transitions. [2018-01-24 23:42:33,987 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 243 transitions. Word has length 24 [2018-01-24 23:42:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:33,987 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 243 transitions. [2018-01-24 23:42:33,987 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:42:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 243 transitions. [2018-01-24 23:42:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:42:33,989 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:33,989 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:33,989 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:33,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1439697764, now seen corresponding path program 1 times [2018-01-24 23:42:33,989 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:33,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,990 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:33,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:33,991 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:34,007 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:34,191 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:34,191 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:42:34,191 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:34,191 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:42:34,192 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:42:34,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:42:34,192 INFO L87 Difference]: Start difference. First operand 190 states and 243 transitions. Second operand 6 states. [2018-01-24 23:42:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:34,425 INFO L93 Difference]: Finished difference Result 471 states and 593 transitions. [2018-01-24 23:42:34,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:42:34,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-01-24 23:42:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:34,427 INFO L225 Difference]: With dead ends: 471 [2018-01-24 23:42:34,427 INFO L226 Difference]: Without dead ends: 290 [2018-01-24 23:42:34,428 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:42:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-01-24 23:42:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 206. [2018-01-24 23:42:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-01-24 23:42:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2018-01-24 23:42:34,441 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 24 [2018-01-24 23:42:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:34,441 INFO L432 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2018-01-24 23:42:34,441 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:42:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2018-01-24 23:42:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:42:34,442 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:34,442 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:34,442 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1566782653, now seen corresponding path program 1 times [2018-01-24 23:42:34,443 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:34,444 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:34,444 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:34,444 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:34,444 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:34,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:34,495 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:34,495 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:42:34,495 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:34,495 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:42:34,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:42:34,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:34,496 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand 5 states. [2018-01-24 23:42:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:34,804 INFO L93 Difference]: Finished difference Result 330 states and 414 transitions. [2018-01-24 23:42:34,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:42:34,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 23:42:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:34,806 INFO L225 Difference]: With dead ends: 330 [2018-01-24 23:42:34,806 INFO L226 Difference]: Without dead ends: 329 [2018-01-24 23:42:34,807 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:42:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-01-24 23:42:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 205. [2018-01-24 23:42:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-01-24 23:42:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 262 transitions. [2018-01-24 23:42:34,816 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 262 transitions. Word has length 25 [2018-01-24 23:42:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:34,816 INFO L432 AbstractCegarLoop]: Abstraction has 205 states and 262 transitions. [2018-01-24 23:42:34,816 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:42:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 262 transitions. [2018-01-24 23:42:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:42:34,817 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:34,817 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:34,817 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1566782654, now seen corresponding path program 1 times [2018-01-24 23:42:34,818 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:34,819 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:34,819 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:34,819 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:34,819 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:34,831 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:34,898 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:34,898 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:42:34,899 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:34,899 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:42:34,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:42:34,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:42:34,899 INFO L87 Difference]: Start difference. First operand 205 states and 262 transitions. Second operand 5 states. [2018-01-24 23:42:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:35,186 INFO L93 Difference]: Finished difference Result 365 states and 471 transitions. [2018-01-24 23:42:35,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:42:35,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 23:42:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:35,188 INFO L225 Difference]: With dead ends: 365 [2018-01-24 23:42:35,188 INFO L226 Difference]: Without dead ends: 364 [2018-01-24 23:42:35,188 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:42:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-01-24 23:42:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 204. [2018-01-24 23:42:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-01-24 23:42:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 260 transitions. [2018-01-24 23:42:35,199 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 260 transitions. Word has length 25 [2018-01-24 23:42:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:35,199 INFO L432 AbstractCegarLoop]: Abstraction has 204 states and 260 transitions. [2018-01-24 23:42:35,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:42:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 260 transitions. [2018-01-24 23:42:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:42:35,200 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:35,200 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:35,200 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -554334541, now seen corresponding path program 1 times [2018-01-24 23:42:35,201 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:35,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:35,202 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:35,202 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:35,202 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:35,211 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:35,294 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:42:35,294 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:42:35,294 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:42:35,294 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:42:35,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:42:35,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:42:35,295 INFO L87 Difference]: Start difference. First operand 204 states and 260 transitions. Second operand 6 states. [2018-01-24 23:42:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:42:35,684 INFO L93 Difference]: Finished difference Result 369 states and 467 transitions. [2018-01-24 23:42:35,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:42:35,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-24 23:42:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:42:35,686 INFO L225 Difference]: With dead ends: 369 [2018-01-24 23:42:35,686 INFO L226 Difference]: Without dead ends: 287 [2018-01-24 23:42:35,687 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:42:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-01-24 23:42:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 242. [2018-01-24 23:42:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-01-24 23:42:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 319 transitions. [2018-01-24 23:42:35,706 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 319 transitions. Word has length 26 [2018-01-24 23:42:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:42:35,706 INFO L432 AbstractCegarLoop]: Abstraction has 242 states and 319 transitions. [2018-01-24 23:42:35,706 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:42:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 319 transitions. [2018-01-24 23:42:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:42:35,707 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:42:35,707 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:42:35,708 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:42:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1703794537, now seen corresponding path program 1 times [2018-01-24 23:42:35,708 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:42:35,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:35,709 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:42:35,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:42:35,710 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:42:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:42:35,721 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:42:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:42:35,856 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:42:35,856 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:42:35,857 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-01-24 23:42:35,859 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [10], [16], [18], [21], [136], [140], [144], [146], [150], [152], [155], [160], [161], [164], [168], [210], [212], [218], [220], [221], [222], [223] [2018-01-24 23:42:35,923 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:42:35,923 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown