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_smtcomp.epf -i ../../../trunk/examples/svcomp/memsafety/test-0521_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 05:44:31,485 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 05:44:31,508 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 05:44:31,522 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 05:44:31,523 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 05:44:31,524 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 05:44:31,525 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 05:44:31,527 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 05:44:31,529 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 05:44:31,530 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 05:44:31,530 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 05:44:31,530 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 05:44:31,531 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 05:44:31,532 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 05:44:31,532 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 05:44:31,535 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 05:44:31,537 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 05:44:31,539 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 05:44:31,540 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 05:44:31,542 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 05:44:31,544 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 05:44:31,544 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 05:44:31,544 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 05:44:31,545 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 05:44:31,546 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 05:44:31,547 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 05:44:31,548 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 05:44:31,548 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 05:44:31,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 05:44:31,549 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 05:44:31,549 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 05:44:31,550 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_smtcomp.epf [2018-01-25 05:44:31,560 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 05:44:31,560 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 05:44:31,561 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 05:44:31,561 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 05:44:31,561 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 05:44:31,561 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 05:44:31,562 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-25 05:44:31,562 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 05:44:31,562 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 05:44:31,563 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 05:44:31,563 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 05:44:31,563 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 05:44:31,563 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 05:44:31,563 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 05:44:31,564 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 05:44:31,564 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 05:44:31,564 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 05:44:31,564 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 05:44:31,564 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 05:44:31,565 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 05:44:31,565 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 05:44:31,565 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 05:44:31,565 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 05:44:31,565 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 05:44:31,566 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 05:44:31,566 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 05:44:31,566 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 05:44:31,566 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 05:44:31,566 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 05:44:31,567 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 05:44:31,567 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 05:44:31,567 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 05:44:31,567 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 05:44:31,567 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 05:44:31,568 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 05:44:31,569 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 05:44:31,603 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 05:44:31,615 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 05:44:31,619 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 05:44:31,621 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 05:44:31,621 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 05:44:31,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0521_true-valid-memsafety.i [2018-01-25 05:44:31,800 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 05:44:31,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 05:44:31,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 05:44:31,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 05:44:31,815 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 05:44:31,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 05:44:31" (1/1) ... [2018-01-25 05:44:31,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a446621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:31, skipping insertion in model container [2018-01-25 05:44:31,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 05:44:31" (1/1) ... [2018-01-25 05:44:31,838 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 05:44:31,881 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 05:44:32,014 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 05:44:32,042 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 05:44:32,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32 WrapperNode [2018-01-25 05:44:32,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 05:44:32,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 05:44:32,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 05:44:32,057 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 05:44:32,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (1/1) ... [2018-01-25 05:44:32,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 05:44:32,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 05:44:32,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 05:44:32,112 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 05:44:32,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (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 [2018-01-25 05:44:32,159 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 05:44:32,159 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 05:44:32,159 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 05:44:32,160 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 05:44:32,161 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 05:44:32,161 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-25 05:44:32,161 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 05:44:32,161 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 05:44:32,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 05:44:32,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 05:44:32,949 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 05:44:32,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 05:44:32 BoogieIcfgContainer [2018-01-25 05:44:32,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 05:44:32,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 05:44:32,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 05:44:32,953 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 05:44:32,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 05:44:31" (1/3) ... [2018-01-25 05:44:32,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db982c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 05:44:32, skipping insertion in model container [2018-01-25 05:44:32,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:44:32" (2/3) ... [2018-01-25 05:44:32,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db982c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 05:44:32, skipping insertion in model container [2018-01-25 05:44:32,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 05:44:32" (3/3) ... [2018-01-25 05:44:32,957 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0521_true-valid-memsafety.i [2018-01-25 05:44:32,963 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 05:44:32,970 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 91 error locations. [2018-01-25 05:44:33,027 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 05:44:33,027 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 05:44:33,027 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 05:44:33,027 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 05:44:33,027 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 05:44:33,027 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 05:44:33,027 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 05:44:33,027 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 05:44:33,028 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 05:44:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states. [2018-01-25 05:44:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-25 05:44:33,056 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:33,057 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:44:33,057 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2006593009, now seen corresponding path program 1 times [2018-01-25 05:44:33,063 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:33,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:33,103 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:33,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:33,103 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:33,138 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:33,167 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:33,167 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 05:44:33,167 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:33,170 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 05:44:33,245 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 05:44:33,245 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 05:44:33,247 INFO L87 Difference]: Start difference. First operand 247 states. Second operand 2 states. [2018-01-25 05:44:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:33,289 INFO L93 Difference]: Finished difference Result 488 states and 562 transitions. [2018-01-25 05:44:33,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 05:44:33,291 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-01-25 05:44:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:33,305 INFO L225 Difference]: With dead ends: 488 [2018-01-25 05:44:33,305 INFO L226 Difference]: Without dead ends: 244 [2018-01-25 05:44:33,310 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 05:44:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-25 05:44:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-01-25 05:44:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-01-25 05:44:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2018-01-25 05:44:33,361 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 10 [2018-01-25 05:44:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:33,362 INFO L432 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2018-01-25 05:44:33,362 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 05:44:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2018-01-25 05:44:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-25 05:44:33,363 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:33,363 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:44:33,363 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:33,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1287736010, now seen corresponding path program 1 times [2018-01-25 05:44:33,364 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:33,365 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:33,365 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:33,365 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:33,365 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:33,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:33,445 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:33,446 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 05:44:33,446 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:33,447 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:44:33,447 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:44:33,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:44:33,448 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 4 states. [2018-01-25 05:44:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:33,660 INFO L93 Difference]: Finished difference Result 773 states and 860 transitions. [2018-01-25 05:44:33,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 05:44:33,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-25 05:44:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:33,665 INFO L225 Difference]: With dead ends: 773 [2018-01-25 05:44:33,665 INFO L226 Difference]: Without dead ends: 561 [2018-01-25 05:44:33,667 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 [2018-01-25 05:44:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2018-01-25 05:44:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 256. [2018-01-25 05:44:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-25 05:44:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2018-01-25 05:44:33,687 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 12 [2018-01-25 05:44:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:33,687 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2018-01-25 05:44:33,687 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:44:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2018-01-25 05:44:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 05:44:33,688 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:33,688 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:44:33,688 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1264312096, now seen corresponding path program 1 times [2018-01-25 05:44:33,689 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:33,690 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:33,690 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:33,690 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:33,690 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:33,701 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:33,747 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:33,747 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 05:44:33,747 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:33,747 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:44:33,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:44:33,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:44:33,748 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 4 states. [2018-01-25 05:44:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:34,092 INFO L93 Difference]: Finished difference Result 418 states and 466 transitions. [2018-01-25 05:44:34,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 05:44:34,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 05:44:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:34,094 INFO L225 Difference]: With dead ends: 418 [2018-01-25 05:44:34,095 INFO L226 Difference]: Without dead ends: 416 [2018-01-25 05:44:34,095 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 [2018-01-25 05:44:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2018-01-25 05:44:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 254. [2018-01-25 05:44:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-25 05:44:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2018-01-25 05:44:34,110 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 13 [2018-01-25 05:44:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:34,111 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2018-01-25 05:44:34,111 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:44:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2018-01-25 05:44:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 05:44:34,112 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:34,112 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:44:34,112 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:34,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1264312095, now seen corresponding path program 1 times [2018-01-25 05:44:34,113 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:34,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,114 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:34,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,114 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:34,126 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:34,188 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:34,188 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 05:44:34,189 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:34,189 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:44:34,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:44:34,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:44:34,189 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand 4 states. [2018-01-25 05:44:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:34,362 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2018-01-25 05:44:34,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 05:44:34,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 05:44:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:34,365 INFO L225 Difference]: With dead ends: 351 [2018-01-25 05:44:34,365 INFO L226 Difference]: Without dead ends: 349 [2018-01-25 05:44:34,365 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 05:44:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-01-25 05:44:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 252. [2018-01-25 05:44:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-25 05:44:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2018-01-25 05:44:34,374 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 13 [2018-01-25 05:44:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:34,374 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2018-01-25 05:44:34,374 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:44:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2018-01-25 05:44:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 05:44:34,375 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:34,375 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] [2018-01-25 05:44:34,375 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:34,375 INFO L82 PathProgramCache]: Analyzing trace with hash 184691868, now seen corresponding path program 1 times [2018-01-25 05:44:34,375 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:34,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,376 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:34,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,376 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:34,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:34,429 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:34,429 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 05:44:34,429 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:34,429 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 05:44:34,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 05:44:34,430 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 05:44:34,430 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand 5 states. [2018-01-25 05:44:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:34,508 INFO L93 Difference]: Finished difference Result 499 states and 558 transitions. [2018-01-25 05:44:34,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 05:44:34,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-25 05:44:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:34,510 INFO L225 Difference]: With dead ends: 499 [2018-01-25 05:44:34,511 INFO L226 Difference]: Without dead ends: 327 [2018-01-25 05:44:34,512 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 05:44:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-01-25 05:44:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2018-01-25 05:44:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-01-25 05:44:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 344 transitions. [2018-01-25 05:44:34,524 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 344 transitions. Word has length 20 [2018-01-25 05:44:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:34,524 INFO L432 AbstractCegarLoop]: Abstraction has 292 states and 344 transitions. [2018-01-25 05:44:34,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 05:44:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 344 transitions. [2018-01-25 05:44:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 05:44:34,526 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:34,526 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] [2018-01-25 05:44:34,526 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 415972895, now seen corresponding path program 1 times [2018-01-25 05:44:34,526 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:34,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,528 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:34,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,528 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:34,542 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:34,579 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:34,580 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 05:44:34,580 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:34,580 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:44:34,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:44:34,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:44:34,580 INFO L87 Difference]: Start difference. First operand 292 states and 344 transitions. Second operand 4 states. [2018-01-25 05:44:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:34,919 INFO L93 Difference]: Finished difference Result 456 states and 526 transitions. [2018-01-25 05:44:34,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 05:44:34,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-25 05:44:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:34,921 INFO L225 Difference]: With dead ends: 456 [2018-01-25 05:44:34,922 INFO L226 Difference]: Without dead ends: 454 [2018-01-25 05:44:34,922 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 [2018-01-25 05:44:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2018-01-25 05:44:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 290. [2018-01-25 05:44:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-01-25 05:44:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 342 transitions. [2018-01-25 05:44:34,934 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 342 transitions. Word has length 20 [2018-01-25 05:44:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:34,935 INFO L432 AbstractCegarLoop]: Abstraction has 290 states and 342 transitions. [2018-01-25 05:44:34,935 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:44:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 342 transitions. [2018-01-25 05:44:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 05:44:34,936 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:34,936 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] [2018-01-25 05:44:34,936 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash 415972896, now seen corresponding path program 1 times [2018-01-25 05:44:34,937 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:34,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,938 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:34,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:34,938 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:34,952 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:35,029 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:35,029 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 05:44:35,029 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:35,030 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:44:35,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:44:35,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:44:35,030 INFO L87 Difference]: Start difference. First operand 290 states and 342 transitions. Second operand 4 states. [2018-01-25 05:44:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:35,246 INFO L93 Difference]: Finished difference Result 389 states and 454 transitions. [2018-01-25 05:44:35,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 05:44:35,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-25 05:44:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:35,248 INFO L225 Difference]: With dead ends: 389 [2018-01-25 05:44:35,248 INFO L226 Difference]: Without dead ends: 387 [2018-01-25 05:44:35,249 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 05:44:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-01-25 05:44:35,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 288. [2018-01-25 05:44:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-01-25 05:44:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 340 transitions. [2018-01-25 05:44:35,256 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 340 transitions. Word has length 20 [2018-01-25 05:44:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:35,257 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 340 transitions. [2018-01-25 05:44:35,257 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:44:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 340 transitions. [2018-01-25 05:44:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 05:44:35,257 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:35,258 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] [2018-01-25 05:44:35,258 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash 308407885, now seen corresponding path program 1 times [2018-01-25 05:44:35,258 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:35,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:35,259 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:35,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:35,259 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:35,267 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:35,310 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:35,310 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 05:44:35,310 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:35,310 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 05:44:35,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 05:44:35,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 05:44:35,311 INFO L87 Difference]: Start difference. First operand 288 states and 340 transitions. Second operand 5 states. [2018-01-25 05:44:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:35,465 INFO L93 Difference]: Finished difference Result 408 states and 471 transitions. [2018-01-25 05:44:35,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 05:44:35,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-25 05:44:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:35,467 INFO L225 Difference]: With dead ends: 408 [2018-01-25 05:44:35,467 INFO L226 Difference]: Without dead ends: 319 [2018-01-25 05:44:35,468 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-25 05:44:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-01-25 05:44:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 275. [2018-01-25 05:44:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-01-25 05:44:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 307 transitions. [2018-01-25 05:44:35,478 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 307 transitions. Word has length 23 [2018-01-25 05:44:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:35,478 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 307 transitions. [2018-01-25 05:44:35,478 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 05:44:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 307 transitions. [2018-01-25 05:44:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-25 05:44:35,480 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:35,480 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] [2018-01-25 05:44:35,480 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:35,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1728935830, now seen corresponding path program 1 times [2018-01-25 05:44:35,480 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:35,481 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:35,481 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:35,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:35,482 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:35,497 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:35,563 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:35,563 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 05:44:35,563 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:35,563 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 05:44:35,564 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 05:44:35,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 05:44:35,564 INFO L87 Difference]: Start difference. First operand 275 states and 307 transitions. Second operand 5 states. [2018-01-25 05:44:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:36,069 INFO L93 Difference]: Finished difference Result 460 states and 514 transitions. [2018-01-25 05:44:36,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 05:44:36,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-25 05:44:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:36,071 INFO L225 Difference]: With dead ends: 460 [2018-01-25 05:44:36,071 INFO L226 Difference]: Without dead ends: 457 [2018-01-25 05:44:36,072 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-25 05:44:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2018-01-25 05:44:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 276. [2018-01-25 05:44:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-01-25 05:44:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 310 transitions. [2018-01-25 05:44:36,079 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 310 transitions. Word has length 28 [2018-01-25 05:44:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:36,080 INFO L432 AbstractCegarLoop]: Abstraction has 276 states and 310 transitions. [2018-01-25 05:44:36,080 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 05:44:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 310 transitions. [2018-01-25 05:44:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-25 05:44:36,081 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:36,081 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] [2018-01-25 05:44:36,081 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1728935829, now seen corresponding path program 1 times [2018-01-25 05:44:36,081 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:36,082 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:36,082 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:36,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:36,083 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:36,095 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:36,165 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:36,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 05:44:36,165 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:36,166 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 05:44:36,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 05:44:36,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 05:44:36,166 INFO L87 Difference]: Start difference. First operand 276 states and 310 transitions. Second operand 6 states. [2018-01-25 05:44:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:36,465 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2018-01-25 05:44:36,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 05:44:36,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-25 05:44:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:36,467 INFO L225 Difference]: With dead ends: 388 [2018-01-25 05:44:36,467 INFO L226 Difference]: Without dead ends: 387 [2018-01-25 05:44:36,468 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-25 05:44:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-01-25 05:44:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 275. [2018-01-25 05:44:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-01-25 05:44:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 309 transitions. [2018-01-25 05:44:36,476 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 309 transitions. Word has length 28 [2018-01-25 05:44:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:36,476 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 309 transitions. [2018-01-25 05:44:36,476 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 05:44:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 309 transitions. [2018-01-25 05:44:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-25 05:44:36,478 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:36,478 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] [2018-01-25 05:44:36,478 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -887445228, now seen corresponding path program 1 times [2018-01-25 05:44:36,478 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:36,479 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:36,479 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:36,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:36,480 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:36,487 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:36,537 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:36,537 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 05:44:36,537 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:36,537 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 05:44:36,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 05:44:36,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 05:44:36,537 INFO L87 Difference]: Start difference. First operand 275 states and 309 transitions. Second operand 3 states. [2018-01-25 05:44:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:36,746 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2018-01-25 05:44:36,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 05:44:36,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-01-25 05:44:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:36,749 INFO L225 Difference]: With dead ends: 279 [2018-01-25 05:44:36,749 INFO L226 Difference]: Without dead ends: 255 [2018-01-25 05:44:36,749 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 05:44:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-01-25 05:44:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-01-25 05:44:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-25 05:44:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2018-01-25 05:44:36,758 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 30 [2018-01-25 05:44:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:36,759 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2018-01-25 05:44:36,759 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 05:44:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2018-01-25 05:44:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-25 05:44:36,762 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:36,762 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] [2018-01-25 05:44:36,762 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1380917583, now seen corresponding path program 1 times [2018-01-25 05:44:36,762 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:36,763 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:36,763 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:36,763 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:36,764 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:36,785 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:36,945 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:36,945 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-25 05:44:36,945 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:36,945 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-25 05:44:36,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-25 05:44:36,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-01-25 05:44:36,946 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2018-01-25 05:44:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:38,443 INFO L93 Difference]: Finished difference Result 1031 states and 1163 transitions. [2018-01-25 05:44:38,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-25 05:44:38,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-01-25 05:44:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:38,446 INFO L225 Difference]: With dead ends: 1031 [2018-01-25 05:44:38,447 INFO L226 Difference]: Without dead ends: 1030 [2018-01-25 05:44:38,447 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2018-01-25 05:44:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2018-01-25 05:44:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 253. [2018-01-25 05:44:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-01-25 05:44:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2018-01-25 05:44:38,461 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 32 [2018-01-25 05:44:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:38,461 INFO L432 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2018-01-25 05:44:38,461 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-25 05:44:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2018-01-25 05:44:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-25 05:44:38,463 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:38,463 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] [2018-01-25 05:44:38,463 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1380917584, now seen corresponding path program 1 times [2018-01-25 05:44:38,463 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:38,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:38,464 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:38,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:38,465 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:38,480 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:38,684 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:38,684 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-25 05:44:38,684 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:38,684 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-25 05:44:38,685 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-25 05:44:38,685 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-01-25 05:44:38,685 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand 11 states. [2018-01-25 05:44:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:40,158 INFO L93 Difference]: Finished difference Result 1176 states and 1332 transitions. [2018-01-25 05:44:40,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-25 05:44:40,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-01-25 05:44:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:40,162 INFO L225 Difference]: With dead ends: 1176 [2018-01-25 05:44:40,162 INFO L226 Difference]: Without dead ends: 1175 [2018-01-25 05:44:40,163 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2018-01-25 05:44:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2018-01-25 05:44:40,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 252. [2018-01-25 05:44:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-25 05:44:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2018-01-25 05:44:40,174 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 32 [2018-01-25 05:44:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:40,174 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2018-01-25 05:44:40,174 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-25 05:44:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2018-01-25 05:44:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-25 05:44:40,175 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:40,175 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, 1, 1, 1] [2018-01-25 05:44:40,175 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989974, now seen corresponding path program 1 times [2018-01-25 05:44:40,176 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:40,177 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:40,177 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:40,177 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:40,177 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:40,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-25 05:44:40,225 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:40,225 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 05:44:40,225 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:40,225 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:44:40,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:44:40,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:44:40,226 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand 4 states. [2018-01-25 05:44:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:40,507 INFO L93 Difference]: Finished difference Result 777 states and 874 transitions. [2018-01-25 05:44:40,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 05:44:40,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-01-25 05:44:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:40,511 INFO L225 Difference]: With dead ends: 777 [2018-01-25 05:44:40,511 INFO L226 Difference]: Without dead ends: 775 [2018-01-25 05:44:40,512 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 [2018-01-25 05:44:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2018-01-25 05:44:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 250. [2018-01-25 05:44:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-01-25 05:44:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2018-01-25 05:44:40,524 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 35 [2018-01-25 05:44:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:40,525 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2018-01-25 05:44:40,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:44:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2018-01-25 05:44:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-25 05:44:40,526 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:40,526 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, 1, 1, 1] [2018-01-25 05:44:40,526 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989975, now seen corresponding path program 1 times [2018-01-25 05:44:40,526 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:40,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:40,527 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:40,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:40,528 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:40,542 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:40,667 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:40,667 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 05:44:40,667 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:40,668 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 05:44:40,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 05:44:40,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 05:44:40,668 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand 6 states. [2018-01-25 05:44:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:41,339 INFO L93 Difference]: Finished difference Result 476 states and 543 transitions. [2018-01-25 05:44:41,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 05:44:41,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2018-01-25 05:44:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:41,340 INFO L225 Difference]: With dead ends: 476 [2018-01-25 05:44:41,341 INFO L226 Difference]: Without dead ends: 474 [2018-01-25 05:44:41,341 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-25 05:44:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2018-01-25 05:44:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 256. [2018-01-25 05:44:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-25 05:44:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2018-01-25 05:44:41,349 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 35 [2018-01-25 05:44:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:41,349 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2018-01-25 05:44:41,349 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 05:44:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2018-01-25 05:44:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-25 05:44:41,350 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:41,350 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, 1, 1, 1, 1] [2018-01-25 05:44:41,350 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash 320441296, now seen corresponding path program 1 times [2018-01-25 05:44:41,350 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:41,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:41,351 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:41,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:41,351 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:41,361 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:41,449 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:41,449 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 05:44:41,449 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:41,449 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 05:44:41,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 05:44:41,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 05:44:41,450 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand 6 states. [2018-01-25 05:44:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:41,631 INFO L93 Difference]: Finished difference Result 641 states and 718 transitions. [2018-01-25 05:44:41,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 05:44:41,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-25 05:44:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:41,665 INFO L225 Difference]: With dead ends: 641 [2018-01-25 05:44:41,665 INFO L226 Difference]: Without dead ends: 453 [2018-01-25 05:44:41,666 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-25 05:44:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-01-25 05:44:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 254. [2018-01-25 05:44:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-25 05:44:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2018-01-25 05:44:41,673 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 36 [2018-01-25 05:44:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:41,673 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2018-01-25 05:44:41,673 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 05:44:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2018-01-25 05:44:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-25 05:44:41,673 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:41,673 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, 1, 1, 1, 1, 1, 1] [2018-01-25 05:44:41,674 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1534000121, now seen corresponding path program 1 times [2018-01-25 05:44:41,674 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:41,675 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:41,675 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:41,675 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:41,675 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:41,687 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:42,301 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:44:42,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-01-25 05:44:42,301 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:44:42,302 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-25 05:44:42,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-25 05:44:42,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-01-25 05:44:42,302 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand 16 states. [2018-01-25 05:44:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:44:44,452 INFO L93 Difference]: Finished difference Result 896 states and 1011 transitions. [2018-01-25 05:44:44,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-25 05:44:44,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2018-01-25 05:44:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:44:44,455 INFO L225 Difference]: With dead ends: 896 [2018-01-25 05:44:44,455 INFO L226 Difference]: Without dead ends: 685 [2018-01-25 05:44:44,456 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2018-01-25 05:44:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2018-01-25 05:44:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 247. [2018-01-25 05:44:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-25 05:44:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2018-01-25 05:44:44,463 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 38 [2018-01-25 05:44:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:44:44,464 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2018-01-25 05:44:44,464 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-25 05:44:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2018-01-25 05:44:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-25 05:44:44,464 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:44:44,465 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, 1, 1, 1, 1, 1, 1] [2018-01-25 05:44:44,465 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-25 05:44:44,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1535290008, now seen corresponding path program 1 times [2018-01-25 05:44:44,465 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:44:44,465 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:44,465 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:44:44,466 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:44:44,466 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:44:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:44:44,480 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:44:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:44:44,740 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 05:44:44,740 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 05:44:44,741 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-25 05:44:44,742 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [23], [24], [27], [28], [29], [34], [36], [39], [42], [46], [49], [50], [53], [57], [62], [63], [66], [71], [72], [75], [78], [80], [429], [430], [434], [435], [436] [2018-01-25 05:44:44,787 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 05:44:44,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-25 05:45:30,054 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-25 05:45:30,054 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-25 05:45:30,055 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-25 05:45:30,055 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 05:45:30,055 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-25 05:45:30,062 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:45:30,062 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-25 05:45:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:45:30,116 INFO L270 TraceCheckSpWp]: Computing forward predicates... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown