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_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-reverse_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:57:04,997 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:57:04,999 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:57:05,014 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:57:05,014 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:57:05,015 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:57:05,016 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:57:05,018 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:57:05,020 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:57:05,021 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:57:05,022 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:57:05,022 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:57:05,023 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:57:05,025 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:57:05,026 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:57:05,028 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:57:05,031 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:57:05,033 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:57:05,034 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:57:05,035 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:57:05,038 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:57:05,038 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:57:05,038 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:57:05,039 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:57:05,040 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:57:05,041 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:57:05,041 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:57:05,042 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:57:05,042 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:57:05,042 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:57:05,043 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:57:05,044 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_mostprecise.epf [2018-01-24 20:57:05,052 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:57:05,052 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:57:05,053 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:57:05,053 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:57:05,053 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:57:05,054 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:57:05,054 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:57:05,054 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:57:05,054 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:57:05,055 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:57:05,055 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:57:05,055 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:57:05,055 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:57:05,056 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:57:05,056 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:57:05,056 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:57:05,056 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:57:05,056 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:57:05,056 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:57:05,057 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:57:05,057 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:57:05,057 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:57:05,057 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:57:05,057 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:57:05,058 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:57:05,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:57:05,058 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:57:05,058 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:57:05,058 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:57:05,058 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:57:05,059 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:57:05,059 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:57:05,059 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:57:05,059 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:57:05,059 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:57:05,060 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:57:05,061 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:57:05,093 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:57:05,104 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:57:05,107 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:57:05,108 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:57:05,109 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:57:05,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-reverse_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:57:05,269 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:57:05,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:57:05,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:57:05,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:57:05,280 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:57:05,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd00cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05, skipping insertion in model container [2018-01-24 20:57:05,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,297 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:57:05,336 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:57:05,458 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:57:05,486 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:57:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05 WrapperNode [2018-01-24 20:57:05,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:57:05,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:57:05,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:57:05,494 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:57:05,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... [2018-01-24 20:57:05,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:57:05,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:57:05,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:57:05,527 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:57:05,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:57:05,580 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:57:05,581 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:57:05,581 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:57:05,581 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:57:05,582 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:57:06,150 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:57:06,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:57:06 BoogieIcfgContainer [2018-01-24 20:57:06,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:57:06,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:57:06,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:57:06,155 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:57:06,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:57:05" (1/3) ... [2018-01-24 20:57:06,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91ecc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:57:06, skipping insertion in model container [2018-01-24 20:57:06,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:57:05" (2/3) ... [2018-01-24 20:57:06,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91ecc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:57:06, skipping insertion in model container [2018-01-24 20:57:06,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:57:06" (3/3) ... [2018-01-24 20:57:06,160 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-reverse_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:57:06,170 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:57:06,179 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 65 error locations. [2018-01-24 20:57:06,238 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:57:06,238 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:57:06,238 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:57:06,239 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:57:06,239 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:57:06,239 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:57:06,239 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:57:06,239 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:57:06,240 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:57:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2018-01-24 20:57:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:57:06,275 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:06,276 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:06,276 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash 484042676, now seen corresponding path program 1 times [2018-01-24 20:57:06,285 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:06,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:06,346 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:06,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:06,347 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:06,398 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:06,472 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:06,472 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:57:06,472 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:06,476 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:57:06,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:57:06,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:57:06,493 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2018-01-24 20:57:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:06,821 INFO L93 Difference]: Finished difference Result 280 states and 324 transitions. [2018-01-24 20:57:06,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:57:06,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:57:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:06,831 INFO L225 Difference]: With dead ends: 280 [2018-01-24 20:57:06,831 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 20:57:06,834 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:57:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 20:57:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2018-01-24 20:57:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-24 20:57:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2018-01-24 20:57:06,873 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 8 [2018-01-24 20:57:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:06,874 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2018-01-24 20:57:06,874 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:57:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2018-01-24 20:57:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:57:06,875 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:06,875 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:06,875 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash 484042677, now seen corresponding path program 1 times [2018-01-24 20:57:06,876 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:06,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:06,877 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:06,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:06,877 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:06,893 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:06,957 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:06,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:57:06,957 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:06,958 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:57:06,959 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:57:06,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:57:06,959 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand 4 states. [2018-01-24 20:57:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:07,280 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2018-01-24 20:57:07,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:57:07,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:57:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:07,283 INFO L225 Difference]: With dead ends: 148 [2018-01-24 20:57:07,283 INFO L226 Difference]: Without dead ends: 145 [2018-01-24 20:57:07,284 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:57:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-01-24 20:57:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-01-24 20:57:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-24 20:57:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2018-01-24 20:57:07,298 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 8 [2018-01-24 20:57:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:07,298 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2018-01-24 20:57:07,298 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:57:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2018-01-24 20:57:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 20:57:07,299 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:07,299 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:07,299 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1645542977, now seen corresponding path program 1 times [2018-01-24 20:57:07,300 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:07,301 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:07,301 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:07,301 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:07,302 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:07,330 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:07,383 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:07,384 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:57:07,384 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:07,384 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:57:07,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:57:07,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:57:07,384 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand 4 states. [2018-01-24 20:57:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:07,531 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2018-01-24 20:57:07,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:57:07,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 20:57:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:07,532 INFO L225 Difference]: With dead ends: 158 [2018-01-24 20:57:07,532 INFO L226 Difference]: Without dead ends: 138 [2018-01-24 20:57:07,533 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 [2018-01-24 20:57:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-01-24 20:57:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-01-24 20:57:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-24 20:57:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2018-01-24 20:57:07,542 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 16 [2018-01-24 20:57:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:07,543 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2018-01-24 20:57:07,543 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:57:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2018-01-24 20:57:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 20:57:07,543 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:07,543 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:07,544 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1645542978, now seen corresponding path program 1 times [2018-01-24 20:57:07,544 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:07,545 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:07,545 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:07,545 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:07,545 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:07,562 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:07,668 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:07,668 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:57:07,669 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:07,669 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:57:07,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:57:07,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:57:07,669 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand 7 states. [2018-01-24 20:57:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:07,951 INFO L93 Difference]: Finished difference Result 195 states and 209 transitions. [2018-01-24 20:57:07,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:57:07,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 20:57:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:07,953 INFO L225 Difference]: With dead ends: 195 [2018-01-24 20:57:07,953 INFO L226 Difference]: Without dead ends: 181 [2018-01-24 20:57:07,954 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:57:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-01-24 20:57:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 166. [2018-01-24 20:57:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-01-24 20:57:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2018-01-24 20:57:07,968 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 16 [2018-01-24 20:57:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:07,969 INFO L432 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2018-01-24 20:57:07,969 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:57:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2018-01-24 20:57:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:57:07,970 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:07,970 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:07,970 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:07,970 INFO L82 PathProgramCache]: Analyzing trace with hash 818835877, now seen corresponding path program 1 times [2018-01-24 20:57:07,970 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:07,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:07,971 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:07,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:07,972 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:07,989 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:08,097 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:08,097 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:57:08,097 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:08,098 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:57:08,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:57:08,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:57:08,098 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand 5 states. [2018-01-24 20:57:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:08,495 INFO L93 Difference]: Finished difference Result 292 states and 324 transitions. [2018-01-24 20:57:08,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:57:08,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:57:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:08,497 INFO L225 Difference]: With dead ends: 292 [2018-01-24 20:57:08,497 INFO L226 Difference]: Without dead ends: 291 [2018-01-24 20:57:08,497 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:57:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-01-24 20:57:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 165. [2018-01-24 20:57:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-24 20:57:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 182 transitions. [2018-01-24 20:57:08,508 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 182 transitions. Word has length 18 [2018-01-24 20:57:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:08,509 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 182 transitions. [2018-01-24 20:57:08,509 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:57:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 182 transitions. [2018-01-24 20:57:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:57:08,510 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:08,510 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:08,510 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 818835876, now seen corresponding path program 1 times [2018-01-24 20:57:08,510 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:08,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:08,511 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:08,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:08,512 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:08,521 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:08,554 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:08,554 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:57:08,554 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:08,554 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:57:08,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:57:08,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:57:08,555 INFO L87 Difference]: Start difference. First operand 165 states and 182 transitions. Second operand 5 states. [2018-01-24 20:57:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:08,791 INFO L93 Difference]: Finished difference Result 291 states and 322 transitions. [2018-01-24 20:57:08,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:57:08,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:57:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:08,792 INFO L225 Difference]: With dead ends: 291 [2018-01-24 20:57:08,793 INFO L226 Difference]: Without dead ends: 290 [2018-01-24 20:57:08,793 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:57:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-01-24 20:57:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 164. [2018-01-24 20:57:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-01-24 20:57:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2018-01-24 20:57:08,801 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 18 [2018-01-24 20:57:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:08,801 INFO L432 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2018-01-24 20:57:08,801 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:57:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2018-01-24 20:57:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:57:08,802 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:08,802 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:08,802 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:08,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1530293414, now seen corresponding path program 1 times [2018-01-24 20:57:08,802 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:08,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:08,803 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:08,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:08,803 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:08,817 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:08,925 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:08,925 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:57:08,925 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:08,926 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:57:08,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:57:08,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:57:08,927 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand 9 states. [2018-01-24 20:57:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:09,342 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2018-01-24 20:57:09,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:57:09,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-24 20:57:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:09,344 INFO L225 Difference]: With dead ends: 166 [2018-01-24 20:57:09,344 INFO L226 Difference]: Without dead ends: 165 [2018-01-24 20:57:09,345 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-01-24 20:57:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-24 20:57:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2018-01-24 20:57:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-01-24 20:57:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 179 transitions. [2018-01-24 20:57:09,355 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 179 transitions. Word has length 22 [2018-01-24 20:57:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:09,355 INFO L432 AbstractCegarLoop]: Abstraction has 163 states and 179 transitions. [2018-01-24 20:57:09,356 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:57:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 179 transitions. [2018-01-24 20:57:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:57:09,356 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:09,357 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:09,357 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1530293415, now seen corresponding path program 1 times [2018-01-24 20:57:09,357 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:09,358 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:09,358 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:09,358 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:09,358 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:09,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:09,525 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:09,525 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 20:57:09,525 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:09,525 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:57:09,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:57:09,526 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:57:09,526 INFO L87 Difference]: Start difference. First operand 163 states and 179 transitions. Second operand 10 states. [2018-01-24 20:57:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:10,225 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2018-01-24 20:57:10,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 20:57:10,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-01-24 20:57:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:10,226 INFO L225 Difference]: With dead ends: 167 [2018-01-24 20:57:10,226 INFO L226 Difference]: Without dead ends: 162 [2018-01-24 20:57:10,227 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2018-01-24 20:57:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-01-24 20:57:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2018-01-24 20:57:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-24 20:57:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2018-01-24 20:57:10,236 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 22 [2018-01-24 20:57:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:10,236 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2018-01-24 20:57:10,236 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:57:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2018-01-24 20:57:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 20:57:10,237 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:10,237 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:10,237 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1318343963, now seen corresponding path program 1 times [2018-01-24 20:57:10,237 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:10,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:10,238 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:10,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:10,238 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:10,248 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:10,406 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:10,406 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:57:10,406 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:10,406 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:57:10,407 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:57:10,407 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:57:10,408 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand 6 states. [2018-01-24 20:57:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:10,636 INFO L93 Difference]: Finished difference Result 296 states and 330 transitions. [2018-01-24 20:57:10,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:57:10,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 20:57:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:10,637 INFO L225 Difference]: With dead ends: 296 [2018-01-24 20:57:10,637 INFO L226 Difference]: Without dead ends: 175 [2018-01-24 20:57:10,639 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:57:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-24 20:57:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2018-01-24 20:57:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-01-24 20:57:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2018-01-24 20:57:10,650 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 27 [2018-01-24 20:57:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:10,650 INFO L432 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2018-01-24 20:57:10,651 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:57:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2018-01-24 20:57:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:57:10,651 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:10,651 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:10,652 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:10,652 INFO L82 PathProgramCache]: Analyzing trace with hash 421020147, now seen corresponding path program 1 times [2018-01-24 20:57:10,652 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:10,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:10,653 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:10,653 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:10,653 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:10,665 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:10,742 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:10,742 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:57:10,742 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:10,742 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:57:10,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:57:10,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:57:10,743 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand 6 states. [2018-01-24 20:57:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:10,976 INFO L93 Difference]: Finished difference Result 247 states and 271 transitions. [2018-01-24 20:57:10,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:57:10,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-24 20:57:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:10,978 INFO L225 Difference]: With dead ends: 247 [2018-01-24 20:57:10,978 INFO L226 Difference]: Without dead ends: 181 [2018-01-24 20:57:10,979 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:57:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-01-24 20:57:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2018-01-24 20:57:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-01-24 20:57:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2018-01-24 20:57:10,999 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 28 [2018-01-24 20:57:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:11,000 INFO L432 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2018-01-24 20:57:11,000 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:57:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2018-01-24 20:57:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:57:11,001 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:11,002 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] [2018-01-24 20:57:11,002 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash 851488222, now seen corresponding path program 1 times [2018-01-24 20:57:11,002 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:11,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:11,003 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:11,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:11,004 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:11,017 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:11,089 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:11,089 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:57:11,089 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:11,090 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:57:11,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:57:11,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:57:11,090 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand 5 states. [2018-01-24 20:57:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:11,328 INFO L93 Difference]: Finished difference Result 230 states and 254 transitions. [2018-01-24 20:57:11,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:57:11,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-24 20:57:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:11,329 INFO L225 Difference]: With dead ends: 230 [2018-01-24 20:57:11,329 INFO L226 Difference]: Without dead ends: 229 [2018-01-24 20:57:11,330 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:57:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-01-24 20:57:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 170. [2018-01-24 20:57:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-01-24 20:57:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2018-01-24 20:57:11,338 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 30 [2018-01-24 20:57:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:11,338 INFO L432 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2018-01-24 20:57:11,338 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:57:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2018-01-24 20:57:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:57:11,339 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:11,339 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] [2018-01-24 20:57:11,339 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 851488221, now seen corresponding path program 1 times [2018-01-24 20:57:11,340 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:11,341 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:11,341 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:11,341 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:11,341 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:11,350 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:11,399 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:11,399 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:57:11,399 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:11,399 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:57:11,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:57:11,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:57:11,400 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand 5 states. [2018-01-24 20:57:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:11,675 INFO L93 Difference]: Finished difference Result 229 states and 252 transitions. [2018-01-24 20:57:11,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:57:11,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-24 20:57:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:11,676 INFO L225 Difference]: With dead ends: 229 [2018-01-24 20:57:11,677 INFO L226 Difference]: Without dead ends: 228 [2018-01-24 20:57:11,677 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:57:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-01-24 20:57:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 169. [2018-01-24 20:57:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-01-24 20:57:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2018-01-24 20:57:11,687 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 30 [2018-01-24 20:57:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:11,687 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2018-01-24 20:57:11,687 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:57:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2018-01-24 20:57:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 20:57:11,688 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:11,688 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:11,688 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1694170207, now seen corresponding path program 1 times [2018-01-24 20:57:11,688 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:11,689 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:11,689 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:11,689 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:11,689 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:11,703 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:11,835 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:11,835 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:57:11,835 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:11,836 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:57:11,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:57:11,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:57:11,836 INFO L87 Difference]: Start difference. First operand 169 states and 185 transitions. Second operand 9 states. [2018-01-24 20:57:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:12,219 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2018-01-24 20:57:12,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:57:12,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2018-01-24 20:57:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:12,220 INFO L225 Difference]: With dead ends: 171 [2018-01-24 20:57:12,220 INFO L226 Difference]: Without dead ends: 170 [2018-01-24 20:57:12,221 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-01-24 20:57:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-01-24 20:57:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2018-01-24 20:57:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-01-24 20:57:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2018-01-24 20:57:12,232 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 34 [2018-01-24 20:57:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:12,233 INFO L432 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2018-01-24 20:57:12,233 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:57:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2018-01-24 20:57:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 20:57:12,234 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:12,234 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:12,235 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1694170208, now seen corresponding path program 1 times [2018-01-24 20:57:12,235 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:12,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:12,236 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:12,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:12,236 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:12,251 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:12,462 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:57:12,462 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 20:57:12,462 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:57:12,463 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:57:12,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:57:12,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:57:12,463 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand 10 states. [2018-01-24 20:57:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:57:12,998 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2018-01-24 20:57:13,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 20:57:13,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-01-24 20:57:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:57:13,035 INFO L225 Difference]: With dead ends: 171 [2018-01-24 20:57:13,035 INFO L226 Difference]: Without dead ends: 169 [2018-01-24 20:57:13,035 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-01-24 20:57:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-24 20:57:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2018-01-24 20:57:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-01-24 20:57:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 182 transitions. [2018-01-24 20:57:13,042 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 182 transitions. Word has length 34 [2018-01-24 20:57:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:57:13,042 INFO L432 AbstractCegarLoop]: Abstraction has 166 states and 182 transitions. [2018-01-24 20:57:13,042 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:57:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 182 transitions. [2018-01-24 20:57:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-24 20:57:13,043 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:57:13,043 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:57:13,044 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:57:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash -666441260, now seen corresponding path program 1 times [2018-01-24 20:57:13,044 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:57:13,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:13,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:57:13,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:57:13,045 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:57:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:57:13,059 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:57:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:57:13,219 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:57:13,220 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:57:13,220 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-01-24 20:57:13,222 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [11], [15], [17], [20], [22], [23], [24], [27], [30], [33], [34], [37], [38], [41], [47], [51], [53], [54], [56], [59], [67], [71], [76], [80], [86], [89], [264], [265], [269], [270], [271] [2018-01-24 20:57:13,275 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:57:13,275 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown