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_stack_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:44:29,044 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:44:29,046 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:44:29,059 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:44:29,059 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:44:29,060 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:44:29,061 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:44:29,062 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:44:29,064 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:44:29,065 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:44:29,066 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:44:29,066 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:44:29,067 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:44:29,067 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:44:29,068 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:44:29,071 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:44:29,073 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:44:29,075 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:44:29,077 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:44:29,078 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:44:29,081 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:44:29,081 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:44:29,082 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:44:29,083 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:44:29,084 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:44:29,085 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:44:29,086 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:44:29,086 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:44:29,086 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:44:29,087 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:44:29,088 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:44:29,088 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 23:44:29,098 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:44:29,098 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:44:29,099 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:44:29,099 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:44:29,100 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:44:29,100 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:44:29,100 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:44:29,100 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:44:29,101 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:44:29,101 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:44:29,101 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:44:29,102 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:44:29,102 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:44:29,102 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:44:29,102 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:44:29,102 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:44:29,103 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:44:29,103 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:44:29,103 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:44:29,103 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:44:29,103 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:44:29,104 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:44:29,104 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:44:29,104 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:44:29,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:44:29,104 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:44:29,105 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:44:29,105 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:44:29,105 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:44:29,105 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:44:29,105 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:44:29,106 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:44:29,106 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:44:29,106 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:44:29,107 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:44:29,107 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:44:29,141 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:44:29,154 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:44:29,158 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:44:29,159 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:44:29,160 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:44:29,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_stack_true-valid-memsafety_false-termination.i [2018-01-24 23:44:29,341 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:44:29,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:44:29,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:44:29,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:44:29,357 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:44:29,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eaa2765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29, skipping insertion in model container [2018-01-24 23:44:29,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,380 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:44:29,420 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:44:29,532 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:44:29,558 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:44:29,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29 WrapperNode [2018-01-24 23:44:29,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:44:29,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:44:29,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:44:29,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:44:29,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (1/1) ... [2018-01-24 23:44:29,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:44:29,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:44:29,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:44:29,603 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:44:29,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (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 23:44:29,652 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:44:29,652 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:44:29,653 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:44:29,653 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:44:29,653 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:44:29,653 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:44:29,653 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:44:29,653 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:44:29,654 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:44:29,654 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:44:29,654 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:44:29,654 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:44:29,654 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:44:29,654 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:44:30,199 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:44:30,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:44:30 BoogieIcfgContainer [2018-01-24 23:44:30,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:44:30,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:44:30,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:44:30,203 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:44:30,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:44:29" (1/3) ... [2018-01-24 23:44:30,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7eba89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:44:30, skipping insertion in model container [2018-01-24 23:44:30,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:44:29" (2/3) ... [2018-01-24 23:44:30,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7eba89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:44:30, skipping insertion in model container [2018-01-24 23:44:30,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:44:30" (3/3) ... [2018-01-24 23:44:30,208 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_stack_true-valid-memsafety_false-termination.i [2018-01-24 23:44:30,218 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:44:30,227 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 65 error locations. [2018-01-24 23:44:30,277 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:44:30,278 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:44:30,278 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:44:30,278 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:44:30,278 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:44:30,278 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:44:30,278 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:44:30,278 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:44:30,279 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:44:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2018-01-24 23:44:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 23:44:30,304 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:30,305 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:30,305 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1338247859, now seen corresponding path program 1 times [2018-01-24 23:44:30,310 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:30,350 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:30,351 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:30,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:30,351 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:30,395 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:30,461 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 23:44:30,463 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:30,464 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:30,464 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:30,468 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:30,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:30,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:30,482 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 4 states. [2018-01-24 23:44:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:30,781 INFO L93 Difference]: Finished difference Result 298 states and 326 transitions. [2018-01-24 23:44:30,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:44:30,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 23:44:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:30,791 INFO L225 Difference]: With dead ends: 298 [2018-01-24 23:44:30,791 INFO L226 Difference]: Without dead ends: 158 [2018-01-24 23:44:30,794 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 23:44:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-01-24 23:44:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 142. [2018-01-24 23:44:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-01-24 23:44:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2018-01-24 23:44:30,829 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 8 [2018-01-24 23:44:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:30,829 INFO L432 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2018-01-24 23:44:30,829 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2018-01-24 23:44:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 23:44:30,829 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:30,830 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:30,830 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1338247858, now seen corresponding path program 1 times [2018-01-24 23:44:30,830 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:30,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:30,831 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:30,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:30,831 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:30,849 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:30,910 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 23:44:30,911 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:30,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:30,911 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:30,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:30,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:30,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:30,913 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 4 states. [2018-01-24 23:44:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:31,107 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2018-01-24 23:44:31,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:44:31,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 23:44:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:31,110 INFO L225 Difference]: With dead ends: 142 [2018-01-24 23:44:31,110 INFO L226 Difference]: Without dead ends: 140 [2018-01-24 23:44:31,111 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 23:44:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-01-24 23:44:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-01-24 23:44:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-24 23:44:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2018-01-24 23:44:31,124 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 8 [2018-01-24 23:44:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:31,125 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2018-01-24 23:44:31,125 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2018-01-24 23:44:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:44:31,125 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:31,126 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:31,126 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1963213562, now seen corresponding path program 1 times [2018-01-24 23:44:31,126 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:31,127 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,127 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:31,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,128 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:31,142 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:31,177 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 23:44:31,177 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:31,177 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:31,177 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:31,178 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:31,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:31,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:31,178 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 4 states. [2018-01-24 23:44:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:31,326 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2018-01-24 23:44:31,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:44:31,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 23:44:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:31,327 INFO L225 Difference]: With dead ends: 164 [2018-01-24 23:44:31,327 INFO L226 Difference]: Without dead ends: 148 [2018-01-24 23:44:31,328 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 23:44:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-01-24 23:44:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 127. [2018-01-24 23:44:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-24 23:44:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2018-01-24 23:44:31,337 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 14 [2018-01-24 23:44:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:31,337 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2018-01-24 23:44:31,337 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2018-01-24 23:44:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:44:31,338 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:31,338 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:31,338 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:31,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1963213563, now seen corresponding path program 1 times [2018-01-24 23:44:31,339 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:31,340 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,340 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:31,340 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,340 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:31,356 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:31,428 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 23:44:31,428 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:31,428 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:31,428 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:31,429 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:31,429 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:31,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:31,429 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 5 states. [2018-01-24 23:44:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:31,632 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2018-01-24 23:44:31,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:44:31,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:44:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:31,671 INFO L225 Difference]: With dead ends: 185 [2018-01-24 23:44:31,671 INFO L226 Difference]: Without dead ends: 173 [2018-01-24 23:44:31,672 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:44:31,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-01-24 23:44:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 157. [2018-01-24 23:44:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-01-24 23:44:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2018-01-24 23:44:31,684 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 14 [2018-01-24 23:44:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:31,684 INFO L432 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2018-01-24 23:44:31,684 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2018-01-24 23:44:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:44:31,685 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:31,685 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:31,686 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1159097560, now seen corresponding path program 1 times [2018-01-24 23:44:31,686 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:31,687 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,687 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:31,687 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,687 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:31,701 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:31,736 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 23:44:31,736 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:31,737 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:31,737 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:31,742 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:31,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:31,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:31,743 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 4 states. [2018-01-24 23:44:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:31,848 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2018-01-24 23:44:31,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:44:31,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:44:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:31,850 INFO L225 Difference]: With dead ends: 173 [2018-01-24 23:44:31,850 INFO L226 Difference]: Without dead ends: 170 [2018-01-24 23:44:31,850 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 23:44:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-01-24 23:44:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 158. [2018-01-24 23:44:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-24 23:44:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2018-01-24 23:44:31,860 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 16 [2018-01-24 23:44:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:31,861 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2018-01-24 23:44:31,861 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2018-01-24 23:44:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:44:31,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:31,862 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:31,862 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1159097561, now seen corresponding path program 1 times [2018-01-24 23:44:31,862 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:31,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,863 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:31,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:31,864 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:31,874 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:31,919 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 23:44:31,919 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:31,919 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:31,919 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:31,919 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:31,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:31,920 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:31,920 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 4 states. [2018-01-24 23:44:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:32,022 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2018-01-24 23:44:32,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:44:32,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:44:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:32,023 INFO L225 Difference]: With dead ends: 163 [2018-01-24 23:44:32,023 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 23:44:32,023 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 23:44:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 23:44:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2018-01-24 23:44:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-24 23:44:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 180 transitions. [2018-01-24 23:44:32,032 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 180 transitions. Word has length 16 [2018-01-24 23:44:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:32,033 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 180 transitions. [2018-01-24 23:44:32,033 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 180 transitions. [2018-01-24 23:44:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-24 23:44:32,034 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:32,034 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] [2018-01-24 23:44:32,034 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash 990226269, now seen corresponding path program 1 times [2018-01-24 23:44:32,034 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:32,035 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,035 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:32,035 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,036 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:32,048 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:32,077 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 23:44:32,077 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:32,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:32,078 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:32,078 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:32,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:32,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:32,079 INFO L87 Difference]: Start difference. First operand 156 states and 180 transitions. Second operand 4 states. [2018-01-24 23:44:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:32,111 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2018-01-24 23:44:32,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:44:32,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-01-24 23:44:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:32,112 INFO L225 Difference]: With dead ends: 160 [2018-01-24 23:44:32,112 INFO L226 Difference]: Without dead ends: 157 [2018-01-24 23:44:32,113 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 23:44:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-24 23:44:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2018-01-24 23:44:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-24 23:44:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2018-01-24 23:44:32,120 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 21 [2018-01-24 23:44:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:32,120 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2018-01-24 23:44:32,120 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2018-01-24 23:44:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:44:32,121 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:32,121 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 23:44:32,121 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 632244512, now seen corresponding path program 1 times [2018-01-24 23:44:32,121 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:32,122 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,122 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:32,122 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,122 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:32,133 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:32,165 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 23:44:32,165 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:32,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:32,165 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:32,166 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:32,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:32,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:32,166 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand 5 states. [2018-01-24 23:44:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:32,319 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2018-01-24 23:44:32,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:44:32,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-01-24 23:44:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:32,321 INFO L225 Difference]: With dead ends: 175 [2018-01-24 23:44:32,321 INFO L226 Difference]: Without dead ends: 171 [2018-01-24 23:44:32,321 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:44:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-01-24 23:44:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 155. [2018-01-24 23:44:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-01-24 23:44:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2018-01-24 23:44:32,328 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 22 [2018-01-24 23:44:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:32,328 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2018-01-24 23:44:32,329 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2018-01-24 23:44:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:44:32,330 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:32,330 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 23:44:32,330 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 632244513, now seen corresponding path program 1 times [2018-01-24 23:44:32,330 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:32,331 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,331 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:32,331 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,332 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:32,342 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:32,390 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 23:44:32,390 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:32,390 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:32,390 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:32,391 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:32,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:32,391 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:32,391 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand 5 states. [2018-01-24 23:44:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:32,546 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2018-01-24 23:44:32,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:44:32,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-01-24 23:44:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:32,547 INFO L225 Difference]: With dead ends: 177 [2018-01-24 23:44:32,547 INFO L226 Difference]: Without dead ends: 175 [2018-01-24 23:44:32,548 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 23:44:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-24 23:44:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 157. [2018-01-24 23:44:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-01-24 23:44:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2018-01-24 23:44:32,554 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 22 [2018-01-24 23:44:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:32,554 INFO L432 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2018-01-24 23:44:32,554 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2018-01-24 23:44:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:44:32,555 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:32,555 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 23:44:32,555 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:32,555 INFO L82 PathProgramCache]: Analyzing trace with hash -733762389, now seen corresponding path program 1 times [2018-01-24 23:44:32,555 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:32,556 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,556 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:32,556 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,556 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:32,566 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:32,595 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 23:44:32,595 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:32,595 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:32,595 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:32,596 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:44:32,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:44:32,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:44:32,597 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 3 states. [2018-01-24 23:44:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:32,608 INFO L93 Difference]: Finished difference Result 307 states and 355 transitions. [2018-01-24 23:44:32,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:44:32,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-01-24 23:44:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:32,610 INFO L225 Difference]: With dead ends: 307 [2018-01-24 23:44:32,610 INFO L226 Difference]: Without dead ends: 159 [2018-01-24 23:44:32,611 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 23:44:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-01-24 23:44:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-01-24 23:44:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-01-24 23:44:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2018-01-24 23:44:32,617 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 22 [2018-01-24 23:44:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:32,617 INFO L432 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2018-01-24 23:44:32,618 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:44:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2018-01-24 23:44:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:44:32,619 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:32,619 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 23:44:32,619 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1797349272, now seen corresponding path program 1 times [2018-01-24 23:44:32,620 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:32,621 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,621 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:32,621 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:32,621 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:32,641 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:32,822 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 23:44:32,823 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:32,823 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:44:32,823 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:32,823 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:44:32,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:44:32,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:44:32,823 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand 6 states. [2018-01-24 23:44:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:33,021 INFO L93 Difference]: Finished difference Result 352 states and 406 transitions. [2018-01-24 23:44:33,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:44:33,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-01-24 23:44:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:33,023 INFO L225 Difference]: With dead ends: 352 [2018-01-24 23:44:33,023 INFO L226 Difference]: Without dead ends: 202 [2018-01-24 23:44:33,024 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 23:44:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-24 23:44:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2018-01-24 23:44:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-01-24 23:44:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2018-01-24 23:44:33,033 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 24 [2018-01-24 23:44:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:33,033 INFO L432 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2018-01-24 23:44:33,034 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:44:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2018-01-24 23:44:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:44:33,034 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:33,035 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 23:44:33,035 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:33,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1764795143, now seen corresponding path program 1 times [2018-01-24 23:44:33,035 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:33,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:33,036 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:33,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:33,036 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:33,051 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:33,390 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 23:44:33,391 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:33,391 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-24 23:44:33,391 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:33,391 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 23:44:33,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 23:44:33,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:44:33,392 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 12 states. [2018-01-24 23:44:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:34,181 INFO L93 Difference]: Finished difference Result 192 states and 223 transitions. [2018-01-24 23:44:34,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 23:44:34,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-01-24 23:44:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:34,182 INFO L225 Difference]: With dead ends: 192 [2018-01-24 23:44:34,182 INFO L226 Difference]: Without dead ends: 191 [2018-01-24 23:44:34,182 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2018-01-24 23:44:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-24 23:44:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2018-01-24 23:44:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-01-24 23:44:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 205 transitions. [2018-01-24 23:44:34,188 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 205 transitions. Word has length 25 [2018-01-24 23:44:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:34,188 INFO L432 AbstractCegarLoop]: Abstraction has 176 states and 205 transitions. [2018-01-24 23:44:34,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 23:44:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 205 transitions. [2018-01-24 23:44:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:44:34,189 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:34,189 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 23:44:34,189 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1764795144, now seen corresponding path program 1 times [2018-01-24 23:44:34,190 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:34,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:34,190 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:34,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:34,191 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:34,205 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:34,446 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 23:44:34,446 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:34,446 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 23:44:34,446 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:34,446 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 23:44:34,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 23:44:34,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:44:34,447 INFO L87 Difference]: Start difference. First operand 176 states and 205 transitions. Second operand 11 states. [2018-01-24 23:44:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:34,911 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2018-01-24 23:44:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 23:44:34,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-01-24 23:44:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:34,913 INFO L225 Difference]: With dead ends: 245 [2018-01-24 23:44:34,913 INFO L226 Difference]: Without dead ends: 240 [2018-01-24 23:44:34,914 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2018-01-24 23:44:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-01-24 23:44:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2018-01-24 23:44:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-01-24 23:44:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2018-01-24 23:44:34,923 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 25 [2018-01-24 23:44:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:34,923 INFO L432 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2018-01-24 23:44:34,923 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 23:44:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2018-01-24 23:44:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:44:34,924 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:34,924 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 23:44:34,925 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2572345, now seen corresponding path program 1 times [2018-01-24 23:44:34,925 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:34,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:34,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:34,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:34,926 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:34,936 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:34,985 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 23:44:34,985 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:34,985 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:34,985 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:34,985 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:34,986 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:34,986 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:34,986 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 5 states. [2018-01-24 23:44:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:35,228 INFO L93 Difference]: Finished difference Result 277 states and 330 transitions. [2018-01-24 23:44:35,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:44:35,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 23:44:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:35,230 INFO L225 Difference]: With dead ends: 277 [2018-01-24 23:44:35,230 INFO L226 Difference]: Without dead ends: 276 [2018-01-24 23:44:35,230 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 23:44:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-01-24 23:44:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 191. [2018-01-24 23:44:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-01-24 23:44:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 226 transitions. [2018-01-24 23:44:35,241 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 226 transitions. Word has length 25 [2018-01-24 23:44:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:35,241 INFO L432 AbstractCegarLoop]: Abstraction has 191 states and 226 transitions. [2018-01-24 23:44:35,241 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 226 transitions. [2018-01-24 23:44:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:44:35,242 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:35,243 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 23:44:35,243 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2572346, now seen corresponding path program 1 times [2018-01-24 23:44:35,243 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:35,244 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:35,244 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:35,244 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:35,244 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:35,254 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:35,320 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 23:44:35,320 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:35,321 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:35,321 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:35,321 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:35,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:35,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:35,322 INFO L87 Difference]: Start difference. First operand 191 states and 226 transitions. Second operand 5 states. [2018-01-24 23:44:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:35,735 INFO L93 Difference]: Finished difference Result 337 states and 399 transitions. [2018-01-24 23:44:35,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:44:35,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 23:44:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:35,737 INFO L225 Difference]: With dead ends: 337 [2018-01-24 23:44:35,737 INFO L226 Difference]: Without dead ends: 336 [2018-01-24 23:44:35,737 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 23:44:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-01-24 23:44:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 190. [2018-01-24 23:44:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-24 23:44:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 224 transitions. [2018-01-24 23:44:35,748 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 224 transitions. Word has length 25 [2018-01-24 23:44:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:35,749 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 224 transitions. [2018-01-24 23:44:35,749 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 224 transitions. [2018-01-24 23:44:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:44:35,750 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:35,750 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, 1, 1, 1] [2018-01-24 23:44:35,750 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:35,750 INFO L82 PathProgramCache]: Analyzing trace with hash -676623804, now seen corresponding path program 1 times [2018-01-24 23:44:35,750 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:35,751 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:35,751 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:35,752 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:35,752 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:35,763 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:35,850 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 23:44:35,850 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:35,850 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:44:35,850 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:35,851 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:44:35,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:44:35,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:44:35,851 INFO L87 Difference]: Start difference. First operand 190 states and 224 transitions. Second operand 9 states. [2018-01-24 23:44:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:36,326 INFO L93 Difference]: Finished difference Result 228 states and 270 transitions. [2018-01-24 23:44:36,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:44:36,327 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-01-24 23:44:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:36,328 INFO L225 Difference]: With dead ends: 228 [2018-01-24 23:44:36,328 INFO L226 Difference]: Without dead ends: 227 [2018-01-24 23:44:36,329 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-01-24 23:44:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-01-24 23:44:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 189. [2018-01-24 23:44:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-01-24 23:44:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 222 transitions. [2018-01-24 23:44:36,340 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 222 transitions. Word has length 28 [2018-01-24 23:44:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:36,340 INFO L432 AbstractCegarLoop]: Abstraction has 189 states and 222 transitions. [2018-01-24 23:44:36,340 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:44:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 222 transitions. [2018-01-24 23:44:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:44:36,341 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:36,342 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, 1, 1, 1] [2018-01-24 23:44:36,342 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:36,342 INFO L82 PathProgramCache]: Analyzing trace with hash -676623803, now seen corresponding path program 1 times [2018-01-24 23:44:36,342 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:36,343 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:36,343 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:36,343 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:36,344 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:36,357 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:36,557 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 23:44:36,557 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:36,557 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:44:36,557 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:36,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:44:36,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:44:36,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:44:36,558 INFO L87 Difference]: Start difference. First operand 189 states and 222 transitions. Second operand 9 states. [2018-01-24 23:44:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:37,057 INFO L93 Difference]: Finished difference Result 227 states and 268 transitions. [2018-01-24 23:44:37,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:44:37,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-01-24 23:44:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:37,058 INFO L225 Difference]: With dead ends: 227 [2018-01-24 23:44:37,058 INFO L226 Difference]: Without dead ends: 226 [2018-01-24 23:44:37,059 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-01-24 23:44:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-01-24 23:44:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 188. [2018-01-24 23:44:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-01-24 23:44:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 220 transitions. [2018-01-24 23:44:37,065 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 220 transitions. Word has length 28 [2018-01-24 23:44:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:37,065 INFO L432 AbstractCegarLoop]: Abstraction has 188 states and 220 transitions. [2018-01-24 23:44:37,065 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:44:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 220 transitions. [2018-01-24 23:44:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 23:44:37,066 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:37,066 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, 1, 1, 1, 1] [2018-01-24 23:44:37,066 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:37,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1254885066, now seen corresponding path program 1 times [2018-01-24 23:44:37,066 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:37,067 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:37,067 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:37,067 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:37,067 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:37,075 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:37,142 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 23:44:37,142 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:37,143 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:37,143 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:37,143 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:37,143 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:37,143 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:37,143 INFO L87 Difference]: Start difference. First operand 188 states and 220 transitions. Second operand 4 states. [2018-01-24 23:44:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:37,490 INFO L93 Difference]: Finished difference Result 245 states and 284 transitions. [2018-01-24 23:44:37,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:44:37,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-01-24 23:44:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:37,491 INFO L225 Difference]: With dead ends: 245 [2018-01-24 23:44:37,491 INFO L226 Difference]: Without dead ends: 243 [2018-01-24 23:44:37,491 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 23:44:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-01-24 23:44:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 186. [2018-01-24 23:44:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-01-24 23:44:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2018-01-24 23:44:37,497 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 29 [2018-01-24 23:44:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:37,498 INFO L432 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2018-01-24 23:44:37,498 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2018-01-24 23:44:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 23:44:37,498 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:37,498 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, 1, 1, 1, 1] [2018-01-24 23:44:37,498 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:37,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1254885065, now seen corresponding path program 1 times [2018-01-24 23:44:37,499 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:37,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:37,500 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:37,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:37,500 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:37,509 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:37,533 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 23:44:37,533 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:37,533 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:37,533 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:37,534 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:37,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:37,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:37,534 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand 4 states. [2018-01-24 23:44:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:37,947 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2018-01-24 23:44:37,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:44:37,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-01-24 23:44:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:37,949 INFO L225 Difference]: With dead ends: 213 [2018-01-24 23:44:37,949 INFO L226 Difference]: Without dead ends: 212 [2018-01-24 23:44:37,949 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 23:44:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-24 23:44:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 185. [2018-01-24 23:44:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-01-24 23:44:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2018-01-24 23:44:37,956 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 29 [2018-01-24 23:44:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:37,956 INFO L432 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2018-01-24 23:44:37,956 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2018-01-24 23:44:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 23:44:37,956 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:37,956 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, 1, 1, 1, 1] [2018-01-24 23:44:37,956 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash 570395414, now seen corresponding path program 1 times [2018-01-24 23:44:37,957 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:37,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:37,958 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:37,958 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:37,958 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:37,965 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:38,019 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 23:44:38,019 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:38,019 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:38,019 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:38,019 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:38,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:38,020 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:38,020 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand 5 states. [2018-01-24 23:44:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:38,477 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2018-01-24 23:44:38,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:44:38,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 23:44:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:38,479 INFO L225 Difference]: With dead ends: 268 [2018-01-24 23:44:38,479 INFO L226 Difference]: Without dead ends: 267 [2018-01-24 23:44:38,479 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 23:44:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-01-24 23:44:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 184. [2018-01-24 23:44:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-24 23:44:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 212 transitions. [2018-01-24 23:44:38,486 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 212 transitions. Word has length 29 [2018-01-24 23:44:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:38,486 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 212 transitions. [2018-01-24 23:44:38,486 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 212 transitions. [2018-01-24 23:44:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 23:44:38,486 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:38,486 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, 1, 1, 1, 1] [2018-01-24 23:44:38,486 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash 570395415, now seen corresponding path program 1 times [2018-01-24 23:44:38,487 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:38,487 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:38,488 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:38,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:38,488 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:38,496 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:38,606 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 23:44:38,606 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:38,606 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:44:38,606 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:38,606 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:44:38,607 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:44:38,607 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:44:38,607 INFO L87 Difference]: Start difference. First operand 184 states and 212 transitions. Second operand 5 states. [2018-01-24 23:44:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:39,371 INFO L93 Difference]: Finished difference Result 325 states and 375 transitions. [2018-01-24 23:44:39,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:44:39,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 23:44:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:39,373 INFO L225 Difference]: With dead ends: 325 [2018-01-24 23:44:39,373 INFO L226 Difference]: Without dead ends: 324 [2018-01-24 23:44:39,373 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:44:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-01-24 23:44:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 183. [2018-01-24 23:44:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-01-24 23:44:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2018-01-24 23:44:39,379 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 29 [2018-01-24 23:44:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:39,379 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2018-01-24 23:44:39,379 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:44:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2018-01-24 23:44:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 23:44:39,380 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:39,380 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, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:39,380 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash -526012245, now seen corresponding path program 1 times [2018-01-24 23:44:39,380 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:39,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:39,381 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:39,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:39,381 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:39,389 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:39,415 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 23:44:39,415 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:39,415 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:39,415 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:39,415 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:39,415 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:39,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:39,415 INFO L87 Difference]: Start difference. First operand 183 states and 210 transitions. Second operand 4 states. [2018-01-24 23:44:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:39,579 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2018-01-24 23:44:39,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:44:39,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2018-01-24 23:44:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:39,581 INFO L225 Difference]: With dead ends: 198 [2018-01-24 23:44:39,581 INFO L226 Difference]: Without dead ends: 197 [2018-01-24 23:44:39,582 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 23:44:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-24 23:44:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2018-01-24 23:44:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-01-24 23:44:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 208 transitions. [2018-01-24 23:44:39,590 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 208 transitions. Word has length 31 [2018-01-24 23:44:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:39,591 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 208 transitions. [2018-01-24 23:44:39,591 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 208 transitions. [2018-01-24 23:44:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 23:44:39,591 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:39,592 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, 1, 1, 1, 1, 1, 1] [2018-01-24 23:44:39,592 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash -526012244, now seen corresponding path program 1 times [2018-01-24 23:44:39,592 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:39,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:39,593 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:39,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:39,593 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:39,604 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:39,654 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 23:44:39,655 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:44:39,655 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:44:39,655 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:44:39,655 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:44:39,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:44:39,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:44:39,656 INFO L87 Difference]: Start difference. First operand 182 states and 208 transitions. Second operand 4 states. [2018-01-24 23:44:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:44:39,798 INFO L93 Difference]: Finished difference Result 222 states and 250 transitions. [2018-01-24 23:44:39,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:44:39,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2018-01-24 23:44:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:44:39,799 INFO L225 Difference]: With dead ends: 222 [2018-01-24 23:44:39,800 INFO L226 Difference]: Without dead ends: 220 [2018-01-24 23:44:39,800 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 23:44:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-01-24 23:44:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 180. [2018-01-24 23:44:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-24 23:44:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2018-01-24 23:44:39,806 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 31 [2018-01-24 23:44:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:44:39,806 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2018-01-24 23:44:39,806 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:44:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2018-01-24 23:44:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 23:44:39,806 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:44:39,806 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-24 23:44:39,806 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:44:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash 886820396, now seen corresponding path program 1 times [2018-01-24 23:44:39,807 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:44:39,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:39,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:44:39,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:44:39,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:44:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:44:39,815 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:44:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:44:39,923 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:44:39,923 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:44:39,924 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-24 23:44:39,925 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [10], [16], [18], [21], [136], [137], [138], [139], [142], [148], [154], [155], [156], [158], [159], [162], [163], [166], [185], [187], [206], [208], [217], [218], [219] [2018-01-24 23:44:39,982 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:44:39,982 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